Accessories for Atlas Lathe Change Gears: gear-Lock, bushing, bolt, nut, drive shaft support

This is a set of accessory parts for the Atlas change gears. (See also here: https://www.thingiverse.com/thing:143893)

The gear lock is the part that links the rotation of one gear to another. I have not yet tested all of these in use, and I am not sure if 3D printed plastic will be strong enough. Probably should be printed in ABS etc. The bushing goes inside the gear lock. The bolt goes through the bushing. I suspect that plastic will not be strong enough, but it was easy enough to mod