and getting back to design software...

I haven't heard from Martin in months, I worry that something has happened to him, but I can still get into his Fusion 360 designs to make my own STL files for 3d printing. I'm combining some of his M3 parts into sub-assembles for easy printing and to give them more strength when I make the STL files, but then putting them back to his original configuration before logging out of his design.

A good example is the back part of the M3 crew compartment. Martin has it designed as 3 parts, two sides and a back. Printing three parts and then gluing them together would be hard to get square and make weak points at the glue joints. I combined those three parts in CAD into one part that has the 90 degree angles built in, and then printed it. Much stronger, and no chance for me to screw up the glue joint. I did the same thing with the hood, and I even added the doors onto the hood assembly. I did all that, and then preserved Martin's original designs intact.

That aspect of Fusion 360 is really cool.