diff --git a/repository/Grafoscopio/GrafoscopioGUI.class.st b/repository/Grafoscopio/GrafoscopioGUI.class.st
index 0e8dfe8..21f46c3 100644
--- a/repository/Grafoscopio/GrafoscopioGUI.class.st
+++ b/repository/Grafoscopio/GrafoscopioGUI.class.st
@@ -21,8 +21,7 @@ Class {
 	],
 	#classInstVars : [
 		'dockingBar',
-		'recentNotebooks',
-		'nodesClipboard'
+		'recentNotebooks'
 	],
 	#category : #'Grafoscopio-UI'
 }
@@ -379,16 +378,6 @@ GrafoscopioGUI class >> messageNotImplementedYet [
 		title: 'No implementado aún'.
 ]
 
-{ #category : #accessing }
-GrafoscopioGUI class >> nodesClipboard [
-	^ nodesClipboard
-]
-
-{ #category : #accessing }
-GrafoscopioGUI class >> nodesClipboard: anObject [
-	nodesClipboard := anObject
-]
-
 { #category : #'graphical interface' }
 GrafoscopioGUI class >> open [
 	^ self new open
diff --git a/repository/Grafoscopio/GrafoscopioNode.class.st b/repository/Grafoscopio/GrafoscopioNode.class.st
index 83fe029..ddfa729 100644
--- a/repository/Grafoscopio/GrafoscopioNode.class.st
+++ b/repository/Grafoscopio/GrafoscopioNode.class.st
@@ -23,12 +23,37 @@ Class {
 		'node',
 		'level',
 		'nodesInPreorder',
-		'cacheNode',
 		'metadata'
 	],
+	#classInstVars : [
+		'clipboard'
+	],
 	#category : #'Grafoscopio-Model'
 }
 
+{ #category : #utility }
+GrafoscopioNode class >> cleanTreeRootReferences [
+
+	| ref |
+	clipboard ifNil: [ ^ self ].
+	clipboard children ifNil: [ ^ self ].
+	clipboard preorderTraversal allButFirstDo: [ :n |
+			ref := n.
+			n level - 1 timesRepeat: [ ref := ref parent ].
+			ref parent: nil 
+	] 
+]
+
+{ #category : #accessing }
+GrafoscopioNode class >> clipboard [
+	^ clipboard
+]
+
+{ #category : #accessing }
+GrafoscopioNode class >> clipboard: anObject [
+	clipboard := anObject
+]
+
 { #category : #'instance creation' }
 GrafoscopioNode class >> header: aHeader body: aText [
 	"Create a new instance with given header and body"
@@ -59,7 +84,7 @@ GrafoscopioNode class >> named: aString [
 		yourself
 ]
 
-{ #category : #'as yet unclassified' }
+{ #category : #utility }
 GrafoscopioNode class >> specialWords [
 	"I return a list of word that were used in the first versions of grafoscopio to mark node
 	headers to indicate special ways to handle them and their node contents.
@@ -248,8 +273,17 @@ GrafoscopioNode >> content: anObject [
 
 { #category : #'add/remove nodes' }
 GrafoscopioNode >> copyToClipboard [	
-	GrafoscopioGUI nodesClipboard: self copy.
+	self class clipboard: self copy.
+	self class cleanTreeRootReferences
 	
+	
+]
+
+{ #category : #utility }
+GrafoscopioNode >> deleteReferencesToRoot: aRootNode [
+
+	| sparseTree |
+	sparseTree := self preorderTraversal.
 ]
 
 { #category : #movement }
@@ -541,8 +575,8 @@ GrafoscopioNode >> parent: aNode [
 
 { #category : #'add/remove nodes' }
 GrafoscopioNode >> pasteFromClipboard [	
-	GrafoscopioGUI nodesClipboard 
-		ifNotNil: [ self addNode: GrafoscopioGUI nodesClipboard ]
+	self class clipboard 
+		ifNotNil: [ self addNode: self class clipboard ]
 		ifNil: [ self inform: 'Cache is emtpy. Pleas cut/copy a node before pasting' ]
 	
 ]
diff --git a/repository/Grafoscopio/GrafoscopioNotebook.class.st b/repository/Grafoscopio/GrafoscopioNotebook.class.st
index 593e139..a8f7635 100644
--- a/repository/Grafoscopio/GrafoscopioNotebook.class.st
+++ b/repository/Grafoscopio/GrafoscopioNotebook.class.st
@@ -81,6 +81,17 @@ GrafoscopioNotebook >> body: anObject [
 	body := anObject
 ]
 
+{ #category : #'editing nodes' }
+GrafoscopioNotebook >> copyNodeToClipboard [
+	tree highlightedItem content copyToClipboard.
+	self notebookContent: notebook.
+]
+
+{ #category : #'editing nodes' }
+GrafoscopioNotebook >> cutNodeToClipboard [
+	self copyNodeToClipboard; removeNode.
+]
+
 { #category : #'editing nodes' }
 GrafoscopioNotebook >> demoteNode [
 	| editedNode |
@@ -205,19 +216,19 @@ GrafoscopioNotebook >> newWindowMainMenu [
 					name: nil;
 					description: 'Cut';
 					icon: Smalltalk ui icons smallCutIcon;
-					action: [ self inform: 'To be implemented...' ] ].
+					action: [ self cutNodeToClipboard ] ].
 			group addItem: [ :item |
 				item 
 					name: nil;
 					description: 'Copy';
 					icon: Smalltalk ui icons smallCopyIcon;
-					action: [ self inform: 'To be implemented...' ] ].
+					action: [ self copyNodeToClipboard ] ].
 			group addItem: [ :item |
 				item 
 					name: nil;
 					description: 'Paste';
 					icon: Smalltalk ui icons smallPasteIcon;
-					action: [ self inform: 'To be implemented...' ] ]];	
+					action: [ self pasteNodeFromClipboard ] ]];	
 		addGroup: [ :group |
 			group addItem: [ :item |
 				item 
@@ -425,6 +436,12 @@ GrafoscopioNotebook >> openTutorial [
 		ifFalse: [ GrafoscopioGUI updateDocumentationUI ]
 ]
 
+{ #category : #'editing nodes' }
+GrafoscopioNotebook >> pasteNodeFromClipboard [
+	tree highlightedItem content pasteFromClipboard.
+	self notebookContent: notebook.
+]
+
 { #category : #initialization }
 GrafoscopioNotebook >> projectSubMenu [
 	
diff --git a/repository/Grafoscopio/ManifestGrafoscopio.class.st b/repository/Grafoscopio/ManifestGrafoscopio.class.st
index d81e2a5..3dd416b 100644
--- a/repository/Grafoscopio/ManifestGrafoscopio.class.st
+++ b/repository/Grafoscopio/ManifestGrafoscopio.class.st
@@ -18,6 +18,11 @@ ManifestGrafoscopio class >> ruleRBEqualsTrueRuleV1FalsePositive [
 ]
 
 { #category : #'code-critics' }
-ManifestGrafoscopio class >> ruleRBSentNotImplementedRuleV1FalsePositive [
-	^ #(#(#(#RGMetaclassDefinition #(#'GrafoscopioGUI class' #GrafoscopioGUI)) #'2015-12-23T10:38:16.706667-05:00') #(#(#RGClassDefinition #(#GrafoscopioGUI)) #'2016-01-06T18:53:45.844051-05:00') )
+ManifestGrafoscopio class >> ruleRBLongMethodsRuleV1FalsePositive [
+	^ #(#(#(#RGMethodDefinition #(#GrafoscopioNotebook #newWindowMainMenu #false)) #'2016-12-17T18:51:33.99062-05:00') )
+]
+
+{ #category : #'code-critics' }
+ManifestGrafoscopio class >> ruleRBSentNotImplementedRuleV1FalsePositive [
+	^ #(#(#(#RGMetaclassDefinition #(#'GrafoscopioGUI class' #GrafoscopioGUI)) #'2015-12-23T10:38:16.706667-05:00') #(#(#RGClassDefinition #(#GrafoscopioGUI)) #'2016-01-06T18:53:45.844051-05:00') #(#(#RGMethodDefinition #(#GrafoscopioNotebook #newWindowMainMenu #false)) #'2016-12-17T18:51:40.617924-05:00') )
 ]