During some downtime I've been able to work further on the documentation and lately some of the CAD. I've been using Cubify Design to generate the CAD. I had tried out FreeCAD for a while, but it's still early in development. While Cubify isn't open source, it's a good balance between cost and capability.

The github repository has the CAD that I've finished so far, mostly the frame pieces. If you have Cubify check out what's up there. Right now there is only one STEP file of the frame assembly, but more STEP files will be added as it's completed.

Frame Assembled

Frame Exploded View