Hi chinese friend thanks for the link , but you know there is only a little problem I can't speak nor reading the chinese , so is quite difficult understand what I'm clicking on that site !!! And what about you Jim you're right the plug-in isn't what I'm exactly looking for but is useful to , thanks again . I hope some one some day will create this ruby ( that I think must be not so complicated ) . Grazie a tutti , questa comunità di SketchUp è fantastica !!! 😄 . Thanks to all this community is great !!! Ciao