Hi William , this looks great! I will definitely also give it a try. Right now you can only use one python file in the code, because further will be overwritten, i plan to fix this (for your code it's ok) In the latest version also the warning :"is not solid" does not exist anymore because it must be possible to call python functions from within openscad without annoying warning. Keep up the good work :) ---- this is my trial with all history removed