diff --git a/app/node/graph.cpp b/app/node/graph.cpp
index f9a68c500..6c71f5a75 100644
--- a/app/node/graph.cpp
+++ b/app/node/graph.cpp
@@ -83,6 +83,20 @@ void NodeGraph::childEvent(QChildEvent *event)
       emit NodeAdded(node);
       emit node->AddedToGraph(this);
 
+      // Emit input connections
+      for (auto it=node->input_connections().cbegin(); it!=node->input_connections().cend(); it++) {
+        if (nodes().contains(it->second)) {
+          emit InputConnected(it->second, it->first);
+        }
+      }
+
+      // Emit output connections
+      for (auto it=node->output_connections().cbegin(); it!=node->output_connections().cend(); it++) {
+        if (nodes().contains(it->second.node())) {
+          emit InputConnected(it->first, it->second);
+        }
+      }
+
     } else if (event->type() == QEvent::ChildRemoved) {
 
       node_children_.removeOne(node);
diff --git a/app/node/nodecopypaste.cpp b/app/node/nodecopypaste.cpp
index 40f15b6fd..9b4aec472 100644
--- a/app/node/nodecopypaste.cpp
+++ b/app/node/nodecopypaste.cpp
@@ -24,7 +24,6 @@
 
 #include "core.h"
 #include "node/factory.h"
-#include "node/project/serializer/serializer.h"
 #include "widget/nodeview/nodeviewundo.h"
 #include "window/mainwindow/mainwindow.h"
 
@@ -48,47 +47,45 @@ void NodeCopyPasteService::CopyNodesToClipboard(QVector<Node *> nodes, void *use
     }
   }
 
-  ProjectSerializer::Save(nodes.first()->project(), &writer, nodes);
+  ProjectSerializer::SaveData data(nodes.first()->project(), QString(), nodes);
 
-  /*writer.writeStartElement(QStringLiteral("custom"));
-  CopyNodesToClipboardInternal(&writer, nodes, userdata);
-  writer.writeEndElement(); // custom*/
+  CopyNodesToClipboardCallback(nodes, &data, userdata);
+
+  ProjectSerializer::Save(&writer, data);
 
   Core::CopyStringToClipboard(copy_str);
 }
 
-QVector<Node *> NodeCopyPasteService::PasteNodesFromClipboard(Project *project, MultiUndoCommand* command, void *userdata)
+void NodeCopyPasteService::PasteNodesFromClipboard(void *userdata)
 {
-  QVector<Node*> pasted_nodes;
-
   QString clipboard = Core::PasteStringFromClipboard();
   if (clipboard.isEmpty()) {
-    return pasted_nodes;
+    return;
   }
 
   QXmlStreamReader reader(clipboard);
 
   Project temp;
-  ProjectSerializer::Load(&temp, &reader);
+  ProjectSerializer::Result res = ProjectSerializer::Load(&temp, &reader);
 
+  if (res.code() != ProjectSerializer::kSuccess) {
+    return;
+  }
+
+  QVector<Node*> pasted_nodes;
   foreach (Node *n, temp.nodes()) {
     if (!temp.default_nodes().contains(n)) {
+      // Move nodes out of Project
       n->setParent(nullptr);
       pasted_nodes.append(n);
     }
   }
 
-  return pasted_nodes;
-}
+  if (pasted_nodes.isEmpty()) {
+    return;
+  }
 
-void NodeCopyPasteService::CopyNodesToClipboardInternal(QXmlStreamWriter*, const QVector<Node *> &, void*)
-{
-}
-
-void NodeCopyPasteService::PasteNodesFromClipboardInternal(QXmlStreamReader* reader, XMLNodeData &xml_node_data, void*)
-{
-  Q_UNUSED(xml_node_data)
-  reader->skipCurrentElement();
+  PasteNodesToClipboardCallback(pasted_nodes, res.GetLoadData(), userdata);
 }
 
 }
diff --git a/app/node/nodecopypaste.h b/app/node/nodecopypaste.h
index 067bef032..28c53bed9 100644
--- a/app/node/nodecopypaste.h
+++ b/app/node/nodecopypaste.h
@@ -25,7 +25,9 @@
 #include <QUndoCommand>
 
 #include "node/node.h"
+#include "node/project/project.h"
 #include "node/project/sequence/sequence.h"
+#include "node/project/serializer/serializer.h"
 
 namespace olive {
 
@@ -37,11 +39,11 @@ public:
 protected:
   void CopyNodesToClipboard(QVector<Node *> nodes, void* userdata = nullptr);
 
-  QVector<Node*> PasteNodesFromClipboard(Project *project, MultiUndoCommand *command, void* userdata = nullptr);
+  void PasteNodesFromClipboard(void* userdata = nullptr);
 
-  virtual void CopyNodesToClipboardInternal(QXmlStreamWriter *writer, const QVector<Node*> &nodes, void* userdata);
+  virtual void CopyNodesToClipboardCallback(const QVector<Node*> &nodes, ProjectSerializer::SaveData *data, void *userdata){}
 
-  virtual void PasteNodesFromClipboardInternal(QXmlStreamReader *reader, XMLNodeData &xml_node_data, void* userdata);
+  virtual void PasteNodesToClipboardCallback(const QVector<Node*> &nodes, const ProjectSerializer::LoadData &load_data, void *userdata){}
 
 };
 
diff --git a/app/node/project/serializer/serializer.cpp b/app/node/project/serializer/serializer.cpp
index 34f375567..446dced66 100644
--- a/app/node/project/serializer/serializer.cpp
+++ b/app/node/project/serializer/serializer.cpp
@@ -119,24 +119,30 @@ ProjectSerializer::Result ProjectSerializer::Load(Project *project, QXmlStreamRe
   }
 
   if (serializer) {
-    serializer->Load(project, reader, nullptr);
-    return kSuccess;
+    LoadData ld = serializer->Load(project, reader, nullptr);
+    Result r(kSuccess);
+    if (reader->hasError()) {
+      r = Result(kXmlError);
+      r.SetDetails(reader->errorString());
+    }
+    r.SetLoadData(ld);
+    return r;
   } else {
     // Reached the end of the list with no serializer, assume too new
     return kProjectTooNew;
   }
 }
 
-ProjectSerializer::Result ProjectSerializer::Save(Project *project, const QString &filename, const QVector<Node *> &only)
+ProjectSerializer::Result ProjectSerializer::Save(const SaveData &data)
 {
-  QString temp_save = FileFunctions::GetSafeTemporaryFilename(filename);
+  QString temp_save = FileFunctions::GetSafeTemporaryFilename(data.GetFilename());
 
   QFile project_file(temp_save);
 
   if (project_file.open(QFile::WriteOnly | QFile::Text)) {
     QXmlStreamWriter writer(&project_file);
 
-    Result inner_result = Save(project, &writer, filename, only);
+    Result inner_result = Save(&writer, data);
 
     project_file.close();
 
@@ -145,7 +151,7 @@ ProjectSerializer::Result ProjectSerializer::Save(Project *project, const QStrin
     }
 
     // Save was successful, we can now rewrite the original file
-    if (FileFunctions::RenameFileAllowOverwrite(temp_save, filename)) {
+    if (FileFunctions::RenameFileAllowOverwrite(temp_save, data.GetFilename())) {
       return kSuccess;
     } else {
       Result r(kOverwriteError);
@@ -159,7 +165,7 @@ ProjectSerializer::Result ProjectSerializer::Save(Project *project, const QStrin
   }
 }
 
-ProjectSerializer::Result ProjectSerializer::Save(Project *project, QXmlStreamWriter *writer, const QString &filename, const QVector<Node *> &only)
+ProjectSerializer::Result ProjectSerializer::Save(QXmlStreamWriter *writer, const SaveData &data)
 {
   writer->setAutoFormatting(true);
 
@@ -175,13 +181,13 @@ ProjectSerializer::Result ProjectSerializer::Save(Project *project, QXmlStreamWr
   // Allows easy integer math for checking project versions.
   writer->writeTextElement(QStringLiteral("version"), QString::number(serializer->Version()));
 
-  if (!filename.isEmpty()) {
-    writer->writeTextElement("url", filename);
+  if (!data.GetFilename().isEmpty()) {
+    writer->writeTextElement("url", data.GetFilename());
   }
 
   writer->writeStartElement(QStringLiteral("project"));
 
-  serializer->Save(project, writer, only, nullptr);
+  serializer->Save(writer, data, nullptr);
 
   writer->writeEndElement(); // project
 
diff --git a/app/node/project/serializer/serializer.h b/app/node/project/serializer/serializer.h
index ae7db078a..0417f440c 100644
--- a/app/node/project/serializer/serializer.h
+++ b/app/node/project/serializer/serializer.h
@@ -39,7 +39,7 @@ class ProjectSerializer
 public:
   ProjectSerializer() = default;
 
-  virtual ~ProjectSerializer(){};
+  virtual ~ProjectSerializer(){}
 
   DISABLE_COPY_MOVE(ProjectSerializer)
 
@@ -50,7 +50,18 @@ public:
     kUnknownVersion,
     kFileError,
     kXmlError,
-    kOverwriteError,
+    kOverwriteError
+  };
+
+  using SerializedProperties = QHash<Node*, QMap<QString, QString> >;
+
+  class LoadData
+  {
+  public:
+    LoadData() = default;
+
+    SerializedProperties properties;
+
   };
 
   class Result
@@ -63,26 +74,63 @@ public:
     bool operator==(const ResultCode &code) { return code_ == code; }
     bool operator!=(const ResultCode &code) { return code_ != code; }
 
-    const ResultCode &code() const
-    {
-      return code_;
-    }
+    const ResultCode &code() const { return code_; }
 
-    const QString &GetDetails() const
-    {
-      return details_;
-    }
+    const QString &GetDetails() const { return details_; }
 
-    void SetDetails(const QString &s)
-    {
-      details_ = s;
-    }
+    void SetDetails(const QString &s) { details_ = s; }
+
+    const LoadData &GetLoadData() const { return load_data_; }
+
+    void SetLoadData(const LoadData &p) { load_data_ = p; }
 
   private:
     ResultCode code_;
 
     QString details_;
 
+    LoadData load_data_;
+
+  };
+
+  class SaveData
+  {
+  public:
+    SaveData(Project *project, const QString &filename, const QVector<Node*> &only = QVector<Node*>(), const SerializedProperties &p = SerializedProperties())
+    {
+      project_ = project;
+      filename_ = filename;
+      only_serialize_nodes_ = only;
+      properties_ = p;
+    }
+
+    Project *GetProject() const
+    {
+      return project_;
+    }
+
+    const QString &GetFilename() const
+    {
+      return filename_;
+    }
+
+    const QVector<Node*> &GetOnlySerializeNodes() const { return only_serialize_nodes_; }
+
+    void SetOnlySerializeNodes(const QVector<Node*> &only) { only_serialize_nodes_ = only; }
+
+    const SerializedProperties &GetProperties() const { return properties_; }
+
+    void SetProperties(const SerializedProperties &p) { properties_ = p; }
+
+  private:
+    Project *project_;
+
+    QString filename_;
+
+    QVector<Node*> only_serialize_nodes_;
+
+    SerializedProperties properties_;
+
   };
 
   static void Initialize();
@@ -92,17 +140,13 @@ public:
   static Result Load(Project *project, const QString &filename);
   static Result Load(Project *project, QXmlStreamReader *read_device);
 
-  static Result Save(Project *project, const QString &filename, const QVector<Node*> &only = QVector<Node*>());
-  static Result Save(Project *project, QXmlStreamWriter *write_device, const QString &filename, const QVector<Node*> &only = QVector<Node*>());
-  static Result Save(Project *project, QXmlStreamWriter *write_device, const QVector<Node*> &only = QVector<Node*>())
-  {
-    return Save(project, write_device, QString(), only);
-  }
+  static Result Save(const SaveData &data);
+  static Result Save(QXmlStreamWriter *write_device, const SaveData &data);
 
 protected:
-  virtual void Load(Project *project, QXmlStreamReader *reader, void *reserved) const = 0;
+  virtual LoadData Load(Project *project, QXmlStreamReader *reader, void *reserved) const = 0;
 
-  virtual void Save(Project *project, QXmlStreamWriter *writer, const QVector<Node*> &only, void *reserved) const {}
+  virtual void Save(QXmlStreamWriter *writer, const SaveData &data, void *reserved) const {}
 
   virtual uint Version() const = 0;
 
diff --git a/app/node/project/serializer/serializer190219.cpp b/app/node/project/serializer/serializer190219.cpp
index 663af8e1a..6e81bc494 100644
--- a/app/node/project/serializer/serializer190219.cpp
+++ b/app/node/project/serializer/serializer190219.cpp
@@ -22,8 +22,9 @@
 
 namespace olive {
 
-void ProjectSerializer190219::Load(Project *project, QXmlStreamReader *reader, void *reserved) const
+ProjectSerializer::LoadData ProjectSerializer190219::Load(Project *project, QXmlStreamReader *reader, void *reserved) const
 {
+  return LoadData();
 }
 
 }
diff --git a/app/node/project/serializer/serializer190219.h b/app/node/project/serializer/serializer190219.h
index d0e282581..159904c7c 100644
--- a/app/node/project/serializer/serializer190219.h
+++ b/app/node/project/serializer/serializer190219.h
@@ -31,7 +31,7 @@ public:
   ProjectSerializer190219() = default;
 
 protected:
-  virtual void Load(Project *project, QXmlStreamReader *reader, void *reserved) const override;
+  virtual LoadData Load(Project *project, QXmlStreamReader *reader, void *reserved) const override;
 
   virtual uint Version() const override
   {
diff --git a/app/node/project/serializer/serializer210528.cpp b/app/node/project/serializer/serializer210528.cpp
index 4cd941863..4f86102d8 100644
--- a/app/node/project/serializer/serializer210528.cpp
+++ b/app/node/project/serializer/serializer210528.cpp
@@ -24,7 +24,7 @@
 
 namespace olive {
 
-void ProjectSerializer210528::Load(Project *project, QXmlStreamReader *reader, void *reserved) const
+ProjectSerializer210528::LoadData ProjectSerializer210528::Load(Project *project, QXmlStreamReader *reader, void *reserved) const
 {
   XMLNodeData xml_node_data;
 
@@ -161,6 +161,8 @@ void ProjectSerializer210528::Load(Project *project, QXmlStreamReader *reader, v
 
   // Make connections
   PostConnect(xml_node_data);
+
+  return LoadData();
 }
 
 void ProjectSerializer210528::LoadNode(Node *node, XMLNodeData &xml_node_data, QXmlStreamReader *reader) const
diff --git a/app/node/project/serializer/serializer210528.h b/app/node/project/serializer/serializer210528.h
index 4e1660481..7660ccb0f 100644
--- a/app/node/project/serializer/serializer210528.h
+++ b/app/node/project/serializer/serializer210528.h
@@ -31,7 +31,7 @@ public:
   ProjectSerializer210528() = default;
 
 protected:
-  virtual void Load(Project *project, QXmlStreamReader *reader, void *reserved) const override;
+  virtual LoadData Load(Project *project, QXmlStreamReader *reader, void *reserved) const override;
 
   virtual uint Version() const override
   {
diff --git a/app/node/project/serializer/serializer210907.cpp b/app/node/project/serializer/serializer210907.cpp
index 2b2982ae4..72a3aa3f1 100644
--- a/app/node/project/serializer/serializer210907.cpp
+++ b/app/node/project/serializer/serializer210907.cpp
@@ -24,7 +24,7 @@
 
 namespace olive {
 
-void ProjectSerializer210907::Load(Project *project, QXmlStreamReader *reader, void *reserved) const
+ProjectSerializer210907::LoadData ProjectSerializer210907::Load(Project *project, QXmlStreamReader *reader, void *reserved) const
 {
   XMLNodeData xml_node_data;
 
@@ -161,6 +161,8 @@ void ProjectSerializer210907::Load(Project *project, QXmlStreamReader *reader, v
 
   // Make connections
   PostConnect(xml_node_data);
+
+  return LoadData();
 }
 
 void ProjectSerializer210907::LoadNode(Node *node, XMLNodeData &xml_node_data, QXmlStreamReader *reader) const
diff --git a/app/node/project/serializer/serializer210907.h b/app/node/project/serializer/serializer210907.h
index 6f4ff76fa..f3a3ca2f5 100644
--- a/app/node/project/serializer/serializer210907.h
+++ b/app/node/project/serializer/serializer210907.h
@@ -31,7 +31,7 @@ public:
   ProjectSerializer210907() = default;
 
 protected:
-  virtual void Load(Project *project, QXmlStreamReader *reader, void *reserved) const override;
+  virtual LoadData Load(Project *project, QXmlStreamReader *reader, void *reserved) const override;
 
   virtual uint Version() const override
   {
diff --git a/app/node/project/serializer/serializer211228.cpp b/app/node/project/serializer/serializer211228.cpp
index 757bd4f12..1f9b9de4b 100644
--- a/app/node/project/serializer/serializer211228.cpp
+++ b/app/node/project/serializer/serializer211228.cpp
@@ -24,8 +24,10 @@
 
 namespace olive {
 
-void ProjectSerializer211228::Load(Project *project, QXmlStreamReader *reader, void *reserved) const
+ProjectSerializer211228::LoadData ProjectSerializer211228::Load(Project *project, QXmlStreamReader *reader, void *reserved) const
 {
+  QMap<quintptr, QMap<QString, QString> > properties;
+  QMap<quintptr, QMap<quintptr, Node::Position> > positions;
   XMLNodeData xml_node_data;
 
   while (XMLReadNextStartElement(reader)) {
@@ -112,22 +114,15 @@ void ProjectSerializer211228::Load(Project *project, QXmlStreamReader *reader, v
                 }
               }
 
-              Node *context = xml_node_data.node_ptrs.value(context_ptr);
-
-              if (!context) {
-                qWarning() << "Failed to find pointer for context";
-                reader->skipCurrentElement();
-              } else {
+              if (context_ptr) {
                 while (XMLReadNextStartElement(reader)) {
                   if (reader->name() == QStringLiteral("node")) {
                     quintptr node_ptr;
                     Node::Position node_pos;
 
                     if (LoadPosition(reader, &node_ptr, &node_pos)) {
-                      Node *node = xml_node_data.node_ptrs.value(node_ptr);
-
-                      if (node) {
-                        context->SetNodePositionInContext(node, node_pos);
+                      if (node_ptr) {
+                        positions[context_ptr].insert(node_ptr, node_pos);
                       } else {
                         qWarning() << "Failed to find pointer for node position";
                         reader->skipCurrentElement();
@@ -137,6 +132,9 @@ void ProjectSerializer211228::Load(Project *project, QXmlStreamReader *reader, v
                     reader->skipCurrentElement();
                   }
                 }
+              } else {
+                qWarning() << "Attempted to load context with no pointer";
+                reader->skipCurrentElement();
               }
 
             } else {
@@ -147,6 +145,34 @@ void ProjectSerializer211228::Load(Project *project, QXmlStreamReader *reader, v
 
           }
 
+
+        } else if (reader->name() == QStringLiteral("properties")) {
+
+          while (XMLReadNextStartElement(reader)) {
+            if (reader->name() == QStringLiteral("node")) {
+              quintptr ptr = 0;
+
+              XMLAttributeLoop(reader, attr) {
+                if (attr.name() == QStringLiteral("ptr")) {
+                  ptr = attr.value().toULongLong();
+
+                  // Only attribute we're looking for right now
+                  break;
+                }
+              }
+
+              if (ptr) {
+                QMap<QString, QString> properties_for_node;
+                while (XMLReadNextStartElement(reader)) {
+                  properties_for_node.insert(reader->name().toString(), reader->readElementText());
+                }
+                properties.insert(ptr, properties_for_node);
+              }
+            } else {
+              reader->skipCurrentElement();
+            }
+          }
+
         } else {
 
           // Skip this
@@ -159,17 +185,44 @@ void ProjectSerializer211228::Load(Project *project, QXmlStreamReader *reader, v
     }
   }
 
+  // Resolve positions
+  for (auto it=positions.cbegin(); it!=positions.cend(); it++) {
+    Node *ctx = xml_node_data.node_ptrs.value(it.key());
+    if (ctx) {
+      for (auto jt=it.value().cbegin(); jt!=it.value().cend(); jt++) {
+        Node *n = xml_node_data.node_ptrs.value(jt.key());
+        if (n) {
+          ctx->SetNodePositionInContext(n, jt.value());
+        }
+      }
+    }
+  }
+
   // Make connections
   PostConnect(xml_node_data);
+
+  LoadData load_data;
+
+  // Resolve serialized properties (if any)
+  for (auto it=properties.cbegin(); it!=properties.cend(); it++) {
+    Node *node = xml_node_data.node_ptrs.value(it.key());
+    if (node) {
+      load_data.properties.insert(node, it.value());
+    }
+  }
+
+  return load_data;
 }
 
-void ProjectSerializer211228::Save(Project *project, QXmlStreamWriter *writer, const QVector<Node *> &only, void *reserved) const
+void ProjectSerializer211228::Save(QXmlStreamWriter *writer, const SaveData &data, void *reserved) const
 {
-  writer->writeTextElement(QStringLiteral("uuid"), project->GetUuid().toString());
+  Project *project = data.GetProject();
+
+  writer->writeTextElement(QStringLiteral("uuid"), data.GetProject()->GetUuid().toString());
 
   writer->writeStartElement(QStringLiteral("nodes"));
 
-  const QVector<Node*> &using_node_list = (only.isEmpty()) ? project->nodes() : only;
+  const QVector<Node*> &using_node_list = (data.GetOnlySerializeNodes().isEmpty()) ? project->nodes() : data.GetOnlySerializeNodes();
 
   foreach (Node* node, using_node_list) {
     writer->writeStartElement(QStringLiteral("node"));
@@ -202,7 +255,7 @@ void ProjectSerializer211228::Save(Project *project, QXmlStreamWriter *writer, c
       writer->writeAttribute(QStringLiteral("ptr"), QString::number(reinterpret_cast<quintptr>(context)));
 
       for (auto jt=map.cbegin(); jt!=map.cend(); jt++) {
-        if (only.isEmpty() || only.contains(jt.key())) {
+        if (data.GetOnlySerializeNodes().isEmpty() || data.GetOnlySerializeNodes().contains(jt.key())) {
           writer->writeStartElement(QStringLiteral("node"));
           SavePosition(writer, jt.key(), jt.value());
           writer->writeEndElement(); // node
@@ -215,6 +268,22 @@ void ProjectSerializer211228::Save(Project *project, QXmlStreamWriter *writer, c
 
   writer->writeEndElement(); // positions
 
+  writer->writeStartElement(QStringLiteral("properties"));
+
+  for (auto it=data.GetProperties().cbegin(); it!=data.GetProperties().cend(); it++) {
+    writer->writeStartElement(QStringLiteral("node"));
+
+    writer->writeAttribute(QStringLiteral("ptr"), QString::number(reinterpret_cast<quintptr>(it.key())));
+
+    for (auto jt=it.value().cbegin(); jt!=it.value().cend(); jt++) {
+      writer->writeTextElement(jt.key(), jt.value());
+    }
+
+    writer->writeEndElement(); // node
+  }
+
+  writer->writeEndElement(); // properties
+
   // Save main window project layout
   project->GetLayoutInfo().toXml(writer);
 }
@@ -229,7 +298,9 @@ void ProjectSerializer211228::LoadNode(Node *node, XMLNodeData &xml_node_data, Q
     if (reader->name() == QStringLiteral("input")) {
       LoadInput(node, reader, xml_node_data);
     } else if (reader->name() == QStringLiteral("ptr")) {
-      xml_node_data.node_ptrs.insert(reader->readElementText().toULongLong(), node);
+      quintptr ptr = reader->readElementText().toULongLong();
+      xml_node_data.node_ptrs.insert(ptr, node);
+      qDebug() << "Inserting" << ptr << "as" << node;
     } else if (reader->name() == QStringLiteral("label")) {
       node->SetLabel(reader->readElementText());
     } else if (reader->name() == QStringLiteral("uuid")) {
@@ -245,9 +316,7 @@ void ProjectSerializer211228::LoadNode(Node *node, XMLNodeData &xml_node_data, Q
         }
       }
     } else if (reader->name() == QStringLiteral("custom")) {
-
       LoadNodeCustom(reader, node, xml_node_data);
-
     } else if (reader->name() == QStringLiteral("connections")) {
       // Load connections
       while (XMLReadNextStartElement(reader)) {
@@ -307,7 +376,7 @@ void ProjectSerializer211228::LoadNode(Node *node, XMLNodeData &xml_node_data, Q
 
 void ProjectSerializer211228::SaveNode(Node *node, QXmlStreamWriter *writer) const
 {
-  writer->writeTextElement(QStringLiteral("ptr"), QString::number(reinterpret_cast<quintptr>(this)));
+  writer->writeTextElement(QStringLiteral("ptr"), QString::number(reinterpret_cast<quintptr>(node)));
 
   writer->writeTextElement(QStringLiteral("uuid"), node->GetUUID().toString());
   writer->writeTextElement(QStringLiteral("label"), node->GetLabel());
diff --git a/app/node/project/serializer/serializer211228.h b/app/node/project/serializer/serializer211228.h
index 0ad6762b9..5bd0b38b1 100644
--- a/app/node/project/serializer/serializer211228.h
+++ b/app/node/project/serializer/serializer211228.h
@@ -31,9 +31,9 @@ public:
   ProjectSerializer211228() = default;
 
 protected:
-  virtual void Load(Project *project, QXmlStreamReader *reader, void *reserved) const override;
+  virtual LoadData Load(Project *project, QXmlStreamReader *reader, void *reserved) const override;
 
-  virtual void Save(Project *project, QXmlStreamWriter *writer, const QVector<Node*> &only, void *reserved) const override;
+  virtual void Save(QXmlStreamWriter *writer, const SaveData &data, void *reserved) const override;
 
   virtual uint Version() const override
   {
diff --git a/app/task/project/save/save.cpp b/app/task/project/save/save.cpp
index 222fc76d8..1f5742bcf 100644
--- a/app/task/project/save/save.cpp
+++ b/app/task/project/save/save.cpp
@@ -40,7 +40,9 @@ bool ProjectSaveTask::Run()
 {
   QString using_filename = override_filename_.isEmpty() ? project_->filename() : override_filename_;
 
-  ProjectSerializer::Result result = ProjectSerializer::Save(project_, using_filename);
+  ProjectSerializer::SaveData data(project_, using_filename);
+
+  ProjectSerializer::Result result = ProjectSerializer::Save(data);
 
   bool success = false;
 
diff --git a/app/widget/nodeview/nodeview.cpp b/app/widget/nodeview/nodeview.cpp
index d01bc5e81..7c305b63e 100644
--- a/app/widget/nodeview/nodeview.cpp
+++ b/app/widget/nodeview/nodeview.cpp
@@ -205,12 +205,30 @@ void NodeView::CopySelected(bool cut)
 
 void NodeView::Paste()
 {
-  PasteNodesInternal();
+  if (!contexts_.isEmpty()) {
+    PasteNodesFromClipboard();
+  }
 }
 
 void NodeView::Duplicate()
 {
-  PasteNodesInternal(selected_nodes_);
+  if (!selected_nodes_.isEmpty()) {
+    Node::PositionMap map;
+    QVector<Node*> new_nodes;
+    new_nodes.resize(selected_nodes_.size());
+
+    for (int i=0; i<new_nodes.size(); i++) {
+      Node *og = selected_nodes_.at(i);
+      Node *copy = og->copy();
+      Node::CopyInputs(og, copy, false);
+      map.insert(copy, GetAssumedPositionForSelectedNode(og));
+      new_nodes[i] = copy;
+    }
+
+    Node::CopyDependencyGraph(selected_nodes_, new_nodes, nullptr);
+
+    PostPaste(new_nodes, map);
+  }
 }
 
 void NodeView::SetColorLabel(int index)
@@ -903,9 +921,9 @@ bool NodeView::eventFilter(QObject *object, QEvent *event)
   return super::eventFilter(object, event);
 }
 
-void NodeView::CopyNodesToClipboardInternal(QXmlStreamWriter *writer, const QVector<Node *> &nodes, void *userdata)
+void NodeView::CopyNodesToClipboardCallback(const QVector<Node*> &nodes, ProjectSerializer::SaveData *sdata, void *userdata)
 {
-  writer->writeStartElement(QStringLiteral("pos"));
+  ProjectSerializer::SerializedProperties properties;
 
   for (Node *n : nodes) {
     NodeViewItem *item = GetAssumedItemForSelectedNode(n);
@@ -913,59 +931,31 @@ void NodeView::CopyNodesToClipboardInternal(QXmlStreamWriter *writer, const QVec
     if (item) {
       Node::Position pos = item->GetNodePositionData();
 
-      writer->writeStartElement(QStringLiteral("node"));
-      writer->writeAttribute(QStringLiteral("ptr"), QString::number(reinterpret_cast<quintptr>(n)));
-      writer->writeTextElement(QStringLiteral("x"), QString::number(pos.position.x()));
-      writer->writeTextElement(QStringLiteral("y"), QString::number(pos.position.y()));
-      writer->writeTextElement(QStringLiteral("expanded"), QString::number(pos.expanded));
-      writer->writeEndElement(); // node
+      properties[n][QStringLiteral("x")] = QString::number(pos.position.x());
+      properties[n][QStringLiteral("y")] = QString::number(pos.position.y());
+      properties[n][QStringLiteral("expanded")] = QString::number(pos.expanded);
     }
   }
 
-  writer->writeEndElement(); // pos
+  sdata->SetProperties(properties);
 }
 
-void NodeView::PasteNodesFromClipboardInternal(QXmlStreamReader *reader, XMLNodeData &xml_node_data, void *userdata)
+void NodeView::PasteNodesToClipboardCallback(const QVector<Node *> &nodes, const ProjectSerializer::LoadData &ldata, void *userdata)
 {
-  Node::PositionMap *map = static_cast<Node::PositionMap *>(userdata);
+  Node::PositionMap map;
 
-  while (XMLReadNextStartElement(reader)) {
-    if (reader->name() == QStringLiteral("pos")) {
-      while (XMLReadNextStartElement(reader)) {
-        if (reader->name() == QStringLiteral("node")) {
-          Node *n = nullptr;
-          Node::Position pos;
+  for (auto it=ldata.properties.cbegin(); it!=ldata.properties.cend(); it++) {
+    Node::Position pos;
 
-          XMLAttributeLoop(reader, attr) {
-            if (attr.name() == QStringLiteral("ptr")) {
-              n = xml_node_data.node_ptrs.value(attr.value().toULongLong());
-              break;
-            }
-          }
+    const QMap<QString, QString> &node_props = it.value();
+    pos.position.setX(node_props.value(QStringLiteral("x")).toDouble());
+    pos.position.setY(node_props.value(QStringLiteral("y")).toDouble());
+    pos.expanded = node_props.value(QStringLiteral("expanded")).toDouble();
 
-          while (XMLReadNextStartElement(reader)) {
-            if (reader->name() == QStringLiteral("x")) {
-              pos.position.setX(reader->readElementText().toDouble());
-            } else if (reader->name() == QStringLiteral("y")) {
-              pos.position.setY(reader->readElementText().toDouble());
-            } else if (reader->name() == QStringLiteral("expanded")) {
-              pos.expanded = reader->readElementText().toInt();
-            } else {
-              reader->skipCurrentElement();
-            }
-          }
-
-          if (n) {
-            map->insert(n, pos);
-          }
-        } else {
-          reader->skipCurrentElement();
-        }
-      }
-    } else {
-      reader->skipCurrentElement();
-    }
+    map.insert(it.key(), pos);
   }
+
+  PostPaste(nodes, map);
 }
 
 void NodeView::changeEvent(QEvent *e)
@@ -1265,75 +1255,6 @@ void NodeView::ItemAboutToBeDeleted(NodeViewItem *item)
   }
 }
 
-void NodeView::PasteNodesInternal(const QVector<Node *> &duplicate_nodes)
-{
-  // If no graph, do nothing
-  if (contexts_.isEmpty()) {
-    return;
-  }
-
-  // If duplicating nodes, duplicate, otherwise paste
-  QVector<Node*> new_nodes;
-  Node::PositionMap map;
-  if (duplicate_nodes.isEmpty()) {
-    new_nodes = PasteNodesFromClipboard(nullptr, nullptr, &map);
-  } else {
-    new_nodes.resize(selected_nodes_.size());
-
-    for (int i=0; i<new_nodes.size(); i++) {
-      Node *og = selected_nodes_.at(i);
-      Node *copy = og->copy();
-      Node::CopyInputs(og, copy, false);
-      map.insert(copy, GetAssumedPositionForSelectedNode(og));
-      new_nodes[i] = copy;
-    }
-
-    Node::CopyDependencyGraph(selected_nodes_, new_nodes, nullptr);
-  }
-
-  // If no nodes were retrieved, do nothing
-  if (!new_nodes.isEmpty()) {
-    QVector<AttachedItem> new_attached;
-
-    NodeViewItem *first_item = nullptr;
-
-    for (int i=0; i<new_nodes.size(); i++) {
-      Node *node = new_nodes.at(i);
-
-      // Determine if item had a position, if not don't create an item for it
-      NodeViewItem *new_item;
-
-      if (map.contains(node)) {
-        new_item = new NodeViewItem(node, nullptr);
-        new_item->SetFlowDirection(scene_.GetFlowDirection());
-        new_item->SetNodePosition(map.value(node));
-        scene_.addItem(new_item);
-
-        if (!first_item) {
-          first_item = new_item;
-        }
-      } else {
-        new_item = nullptr;
-      }
-
-      new_attached.append({new_item, node, QPointF(0, 0)});
-    }
-
-    // Correct positions
-    if (first_item) {
-      for (int i=0; i<new_attached.size(); i++) {
-        AttachedItem &ai = new_attached[i];
-
-        if (ai.item) {
-          ai.original_pos = first_item->pos() - ai.item->pos();
-        }
-      }
-    }
-
-    SetAttachedItems(new_attached);
-  }
-}
-
 void NodeView::AddContext(Node *n)
 {
   NodeViewContext *ctx = scene_.AddContext(n);
@@ -1449,6 +1370,48 @@ void NodeView::EndEdgeDrag(bool cancel)
   Core::instance()->undo_stack()->pushIfHasChildren(command);
 }
 
+void NodeView::PostPaste(const QVector<Node *> &new_nodes, const Node::PositionMap &map)
+{
+  QVector<AttachedItem> new_attached;
+
+  NodeViewItem *first_item = nullptr;
+
+  for (int i=0; i<new_nodes.size(); i++) {
+    Node *node = new_nodes.at(i);
+
+    // Determine if item had a position, if not don't create an item for it
+    NodeViewItem *new_item;
+
+    if (map.contains(node)) {
+      new_item = new NodeViewItem(node, nullptr);
+      new_item->SetFlowDirection(scene_.GetFlowDirection());
+      new_item->SetNodePosition(map.value(node));
+      scene_.addItem(new_item);
+
+      if (!first_item) {
+        first_item = new_item;
+      }
+    } else {
+      new_item = nullptr;
+    }
+
+    new_attached.append({new_item, node, QPointF(0, 0)});
+  }
+
+  // Correct positions
+  if (first_item) {
+    for (int i=0; i<new_attached.size(); i++) {
+      AttachedItem &ai = new_attached[i];
+
+      if (ai.item) {
+        ai.original_pos = first_item->pos() - ai.item->pos();
+      }
+    }
+  }
+
+  SetAttachedItems(new_attached);
+}
+
 void NodeView::SetAttachedItems(const QVector<AttachedItem> &items)
 {
   // Detach anything currently attached
diff --git a/app/widget/nodeview/nodeview.h b/app/widget/nodeview/nodeview.h
index 510eb54db..b3d6d4038 100644
--- a/app/widget/nodeview/nodeview.h
+++ b/app/widget/nodeview/nodeview.h
@@ -127,8 +127,8 @@ protected:
 
   virtual bool eventFilter(QObject *object, QEvent *event) override;
 
-  virtual void CopyNodesToClipboardInternal(QXmlStreamWriter *writer, const QVector<Node*> &nodes, void* userdata) override;
-  virtual void PasteNodesFromClipboardInternal(QXmlStreamReader *reader, XMLNodeData &xml_node_data, void* userdata) override;
+  virtual void CopyNodesToClipboardCallback(const QVector<Node *> &nodes, ProjectSerializer::SaveData *data, void* userdata) override;
+  virtual void PasteNodesToClipboardCallback(const QVector<Node*> &nodes, const ProjectSerializer::LoadData &ldata, void *userdata) override;
 
   virtual void changeEvent(QEvent *e) override;
 
@@ -155,8 +155,6 @@ private:
 
   void PositionNewEdge(const QPoint &pos);
 
-  void PasteNodesInternal(const QVector<Node*> &duplicate_nodes = QVector<Node *>());
-
   void AddContext(Node *n);
 
   void RemoveContext(Node *n);
@@ -169,6 +167,8 @@ private:
 
   void EndEdgeDrag(bool cancel = false);
 
+  void PostPaste(const QVector<Node*> &new_nodes, const Node::PositionMap &map);
+
   NodeViewMiniMap *minimap_;
 
   struct AttachedItem {
diff --git a/app/widget/timelinewidget/timelinewidget.cpp b/app/widget/timelinewidget/timelinewidget.cpp
index 30fd2babe..cb7cdd4ae 100644
--- a/app/widget/timelinewidget/timelinewidget.cpp
+++ b/app/widget/timelinewidget/timelinewidget.cpp
@@ -300,55 +300,64 @@ void TimelineWidget::DisconnectNodeEvent(ViewerOutput *n)
   }
 }
 
-void TimelineWidget::CopyNodesToClipboardInternal(QXmlStreamWriter *writer, const QVector<Node *> &nodes, void* userdata)
+void TimelineWidget::CopyNodesToClipboardCallback(const QVector<Node *> &nodes, ProjectSerializer::SaveData *sdata, void *userdata)
 {
   // Cache the earliest in point so all copied clips have a "relative" in point that can be pasted anywhere
   QVector<Block*>& selected = *static_cast<QVector<Block*>*>(userdata);
   rational earliest_in = RATIONAL_MAX;
+  ProjectSerializer::SerializedProperties properties;
 
   foreach (Block* block, selected) {
     earliest_in = qMin(earliest_in, block->in());
   }
 
   foreach (Block* block, selected) {
-    writer->writeStartElement(QStringLiteral("block"));
-
-    writer->writeAttribute(QStringLiteral("ptr"), QString::number(reinterpret_cast<quintptr>(block)));
-    writer->writeAttribute(QStringLiteral("in"), (block->in() - earliest_in).toString());
-
-    Track* track = block->track();
-    writer->writeAttribute(QStringLiteral("tracktype"), QString::number(track->type()));
-    writer->writeAttribute(QStringLiteral("trackindex"), QString::number(track->Index()));
-
-    writer->writeEndElement();
+    properties[block][QStringLiteral("in")] = (block->in() - earliest_in).toString();
+    properties[block][QStringLiteral("track")] = block->track()->ToReference().ToString();
   }
+
+  sdata->SetProperties(properties);
 }
 
-void TimelineWidget::PasteNodesFromClipboardInternal(QXmlStreamReader *reader, XMLNodeData& xml_node_data, void *userdata)
+void TimelineWidget::PasteNodesToClipboardCallback(const QVector<Node *> &nodes, const ProjectSerializer::LoadData &load_data, void *userdata)
 {
-  QVector<BlockPasteData>& paste_data = *static_cast<QVector<BlockPasteData>*>(userdata);
+  bool insert = *(bool*)userdata;
 
-  while (XMLReadNextStartElement(reader)) {
-    if (reader->name() == QStringLiteral("block")) {
-      BlockPasteData bpd;
+  MultiUndoCommand *command = new MultiUndoCommand();
 
-      foreach (QXmlStreamAttribute attr, reader->attributes()) {
-        if (attr.name() == QStringLiteral("ptr")) {
-          bpd.block = static_cast<Block*>(xml_node_data.node_ptrs.value(attr.value().toULongLong()));
-        } else if (attr.name() == QStringLiteral("in")) {
-          bpd.in = rational::fromString(attr.value().toString());
-        } else if (attr.name() == QStringLiteral("tracktype")) {
-          bpd.track_type = static_cast<Track::Type>(attr.value().toInt());
-        } else if (attr.name() == QStringLiteral("trackindex")) {
-          bpd.track_index = attr.value().toInt();
-        }
-      }
+  foreach (Node *n, nodes) {
+    command->add_child(new NodeAddCommand(GetConnectedNode()->project(), n));
+  }
 
-      paste_data.append(bpd);
+  rational paste_start = GetTime();
 
-      reader->skipCurrentElement();
+  if (insert) {
+    rational paste_end = GetTime();
+
+    for (auto it=load_data.properties.cbegin(); it!=load_data.properties.cend(); it++) {
+      rational length = static_cast<Block*>(it.key())->length();
+      rational in = rational::fromString(it.value()[QStringLiteral("in")]);
+
+      paste_end = qMax(paste_end, paste_start + in + length);
+    }
+
+    if (paste_end != paste_start) {
+      InsertGapsAt(paste_start, paste_end - paste_start, command);
     }
   }
+
+  for (auto it=load_data.properties.cbegin(); it!=load_data.properties.cend(); it++) {
+    Block *block = static_cast<Block*>(it.key());
+    rational in = rational::fromString(it.value()[QStringLiteral("in")]);
+    Track::Reference track = Track::Reference::FromString(it.value()[QStringLiteral("track")]);
+
+    command->add_child(new TrackPlaceBlockCommand(sequence()->track_list(track.type()),
+                                                  track.index(),
+                                                  block,
+                                                  paste_start + in));
+  }
+
+  Core::instance()->undo_stack()->pushIfHasChildren(command);
 }
 
 void TimelineWidget::SelectAll()
@@ -626,34 +635,7 @@ void TimelineWidget::Paste(bool insert)
     return;
   }
 
-  MultiUndoCommand* command = new MultiUndoCommand();
-
-  QVector<BlockPasteData> paste_data;
-  QVector<Node*> pasted = PasteNodesFromClipboard(GetConnectedNode()->project(), command, &paste_data);
-
-  rational paste_start = GetTime();
-
-  if (insert) {
-    rational paste_end = GetTime();
-
-    foreach (const BlockPasteData& bpd, paste_data) {
-      paste_end = qMax(paste_end, paste_start + bpd.in + bpd.block->length());
-    }
-
-    if (paste_end != paste_start) {
-      InsertGapsAt(paste_start, paste_end - paste_start, command);
-    }
-  }
-
-  foreach (const BlockPasteData& bpd, paste_data) {
-    qDebug() << "Placing" << bpd.block;
-    command->add_child(new TrackPlaceBlockCommand(sequence()->track_list(bpd.track_type),
-                                                  bpd.track_index,
-                                                  bpd.block,
-                                                  paste_start + bpd.in));
-  }
-
-  Core::instance()->undo_stack()->pushIfHasChildren(command);
+  PasteNodesFromClipboard(&insert);
 }
 
 void TimelineWidget::DeleteInToOut(bool ripple)
diff --git a/app/widget/timelinewidget/timelinewidget.h b/app/widget/timelinewidget/timelinewidget.h
index b942fcb44..6515b8369 100644
--- a/app/widget/timelinewidget/timelinewidget.h
+++ b/app/widget/timelinewidget/timelinewidget.h
@@ -272,15 +272,8 @@ protected:
   virtual void ConnectNodeEvent(ViewerOutput* n) override;
   virtual void DisconnectNodeEvent(ViewerOutput* n) override;
 
-  virtual void CopyNodesToClipboardInternal(QXmlStreamWriter *writer, const QVector<Node*> &nodes, void* userdata) override;
-  virtual void PasteNodesFromClipboardInternal(QXmlStreamReader *reader, XMLNodeData &xml_node_data, void* userdata) override;
-
-  struct BlockPasteData {
-    Block* block;
-    rational in;
-    Track::Type track_type;
-    int track_index;
-  };
+  virtual void CopyNodesToClipboardCallback(const QVector<Node*> &nodes, ProjectSerializer::SaveData *data, void *userdata) override;
+  virtual void PasteNodesToClipboardCallback(const QVector<Node*> &nodes, const ProjectSerializer::LoadData &load_data, void *userdata) override;
 
 private:
   QVector<Timeline::EditToInfo> GetEditToInfo(const rational &playhead_time, Timeline::MovementMode mode);