OK, just got Sketchup and the web console installed on my system so I could test this out. Sure enough, making TIG's changes, plus the ones I showed above, and it all works. This is the final code: model = Sketchup.active_model sel = model.selection model.start_operation "mult. pushpull" faces = [] sel.each do |e| faces << e if e.is_a? Sketchup;;Face end faces.each do |face| face.pushpull 100 end model.commit_operation There you go! Let me know how the other tutorials go also!, Chris