That's great info. I started learning CAD using AutoDesk, but my license is about to run out on that. I played with Blender a little, but the interface was a bit unfriendly. I'm sure I'll switch to it when I start to learn CAD more seriously. For now, I've got too many other things I want to learn first.
I'm glad you're familiar with therpf, I'm pretty sure they're gonna love this project.