Here is some more random parts that have been designed and 3d printed.
The parts are the corner brackets for the rear frame, front crossmember with starting crank support, idler wheels and some track links for testing. The tracks seem to work well, I used old bike spokes as pins which are self retaining.
At this point I need to get the frame designed and assembled so I can design the drivetrain, just need to get some 1/2" aluminum square tubing that I will cut in half for frame rails.
-Shawn-