diff --git a/app/node/inputarray.cpp b/app/node/inputarray.cpp
index cbc830a02..e6ed231d5 100644
--- a/app/node/inputarray.cpp
+++ b/app/node/inputarray.cpp
@@ -13,6 +13,11 @@ int NodeInputArray::GetSize() const
   return sub_params_.size();
 }
 
+void NodeInputArray::Prepend()
+{
+  InsertAt(0);
+}
+
 void NodeInputArray::SetSize(int size)
 {
   int old_size = GetSize();
@@ -23,7 +28,7 @@ void NodeInputArray::SetSize(int size)
 
   if (size < old_size) {
     // If the new size is less, delete all extraneous parameters
-    for (int i=size;i<sub_params_.size();i++) {
+    for (int i=size;i<old_size;i++) {
       delete sub_params_.at(i);
     }
   }
@@ -47,9 +52,93 @@ void NodeInputArray::SetSize(int size)
       connect(new_param, SIGNAL(EdgeRemoved(NodeEdgePtr)), this, SIGNAL(EdgeRemoved(NodeEdgePtr)));
     }
   }
+
+  emit SizeChanged(size);
 }
 
-NodeInput *NodeInputArray::ParamAt(int index)
+int NodeInputArray::IndexOfSubParameter(NodeInput *input) const
+{
+  return sub_params_.indexOf(input);
+}
+
+NodeInput *NodeInputArray::ParamAt(int index) const
 {
   return sub_params_.at(index);
 }
+
+void NodeInputArray::InsertAt(int index)
+{
+  qDebug() << "Inserted at";
+
+  // Add another input at the end
+  Append();
+
+  // Shift all connections from index down
+  for (int i=sub_params_.size()-1;i>index;i--) {
+    NodeInput* this_param = sub_params_.at(i);
+    NodeInput* prev_param = sub_params_.at(i-1);
+
+    if (this_param->IsConnected()) {
+      // Disconnect whatever is at this parameter (presumably its connection has already been copied so we can just remove it)
+      NodeParam::DisconnectEdge(this_param->edges().first());
+    }
+
+    if (prev_param->IsConnected()) {
+      // Get edge here (only one since it's an input)
+      NodeEdgePtr edge = prev_param->edges().first();
+
+      // Disconnect it
+      NodeParam::DisconnectEdge(edge);
+
+      // Create a new edge between it and the next one down
+      NodeParam::ConnectEdge(edge->output(),
+                             this_param);
+    }
+  }
+}
+
+void NodeInputArray::Append()
+{
+  qDebug() << "Appended";
+
+  SetSize(GetSize() + 1);
+}
+
+void NodeInputArray::RemoveLast()
+{
+  qDebug() << "Removed last";
+
+  SetSize(GetSize() - 1);
+}
+
+void NodeInputArray::RemoveAt(int index)
+{
+  qDebug() << "Removed at";
+
+  int limit = sub_params_.size() - 1;
+
+  // Shift all connections from index down
+  for (int i=index;i<limit;i++) {
+    NodeInput* this_param = sub_params_.at(i);
+    NodeInput* next_param = sub_params_.at(i + 1);
+
+    if (this_param->IsConnected()) {
+      // Disconnect current edge
+      NodeParam::DisconnectEdge(this_param->edges().first());
+    }
+
+    if (next_param->IsConnected()) {
+      // Get edge from next param
+      NodeEdgePtr edge = next_param->edges().first();
+
+      // Disconnect it
+      NodeParam::DisconnectEdge(edge);
+
+      // Reconnect it to this param
+      NodeParam::ConnectEdge(edge->output(),
+                             this_param);
+    }
+  }
+
+  RemoveLast();
+}
diff --git a/app/node/inputarray.h b/app/node/inputarray.h
index 3fd3b043d..924deacc0 100644
--- a/app/node/inputarray.h
+++ b/app/node/inputarray.h
@@ -5,13 +5,25 @@
 
 class NodeInputArray : public NodeInput
 {
+  Q_OBJECT
 public:
   NodeInputArray(const QString &id);
 
   int GetSize() const;
+
+  void Prepend();
+  void Append();
+  void InsertAt(int index);
+  void RemoveLast();
+  void RemoveAt(int index);
   void SetSize(int size);
 
-  NodeInput* ParamAt(int index);
+  int IndexOfSubParameter(NodeInput* input) const;
+
+  NodeInput* ParamAt(int index) const;
+
+signals:
+  void SizeChanged(int size);
 
 private:
   QVector<NodeInput*> sub_params_;