I know this guy named Yo Han Smittenberg on the forum that does some
CAD in GemVision Matrix 3D. he does OK with it but his problem is he
is slow as dirt. He has a grasp of CAD but would need a little info.
The good CAD software today has a resize feature so after the master
has been drawn it can be sized and saved in a different file as that
size, example, Bobs Pluming master, Bobs Pluming master size 8,
etc… I will send you his email so you can think about where you
might want to go with it.