What are people using for 3D CAD modeling on linux these days? Once upon a time I did this (for a 3D print) and I remember using something that was pretty easy to learn and a nice balance between point and click & parametric geometric construction. I don't remember what I used though. I think for this bicycle restoration project I'm going to have to have a freewheel removal tool CNCed. Should I be using OpenSCAD? FreeCAD? Something else?