[stefanix]

I am a huge FreeCAD fan and use it quite a bit. For simple 3D printing projects I like it better than Rhino for example. Used it for the case of this oxygen system http://nortd.github.io/WaveGlide/

The thing to keep in mind when using it is that not all parts are equally usable. For a stable workflow you have to stick with what works. When you start using less polished corners FreeCAD tends to crash. It takes a bit of testing to figure this out.

Keep up the good work.