Hi Pilou

Unzip attachment and replace "nodeeditor/nodes/extension" folder.
I contains "ExtractEdges" node, so you are good ti go.

<<For the beta V4>>

You will likely encounter error messages attempting to run in V4
It seems that v4 is more stringent in parsing js code.
I could not get "pentakisDodeca&TruncIcosa.nod" to execute.

James