Wow what a nice collection!! Congrats
Also those shots are super nice, you can almost see the ants lurking in the floor!!! What camera are you using?
What brand was the Challenger motor, Reedy? If my memory does not fail Reedy's where 19 turns, man those motor where awesome! With a little timming they where very fast. I had like 3 or 4 of those until a few years back. I missed the old days when brushed motors ruled, they needed a lot of mantainance but that is just part of the hobby. I remember winding my own rotors and experimating with different wire gages and number of winds and wires, sometimes I've built a complete fail, but sometimes they ended up being very good.
Does anyone know how to weld wind wires into the comm tabs? I once tried with common wire solder but when the motor heated up it just created a mess inside of molten solder.