I use Fusion360. It is free for hobbyists and students. alan > On Aug 23, 2021, at 09:34, Rob Jarratt via cctalk <cctalk at classiccmp.org> wrote: > > I think I may need to get a small part 3d printed (some plastic board > mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for > a novice? Preferably free! > > > > Thanks > > > > Rob >