Mini tracked rover for N20 Motors

This is the basis of a tiny trak FPV rover and also an antweight robot. It uses the tub from https://www.thingiverse.com/thing:2930903 and has been remixed to allow the bolt in option for the motors along with some drive stubs. It uses the mini gear motors that are held in with screws to stop them slipping. The wheel stubs can be pressed onto the motor shafts and glued into the leg wheels. The tracks are the lego tracks and the idler bearings are the lego ones cut down and trimmed and then supe