[Fluff]

This has prompted a memory from the distant past , this will only work with a side or angle winder .First an axle tube with the axle bearings in it the side winder gear and the wheels as a unit ,but ,bear with me here, another tube with a close fit ,but able to rotate on the axle tube is fitted and to this is fitted the motor mounts with motor and pinion .In effect the motor can rotate around the rear axle .Fit this to the chassis ,if you powered this up now the motor would flip completely over the axle ,if a stop is now fitted the motor movement can be controlled . Now all this is supposed to help by when applying power out of a curve the motor will jump up ,the theory of opposite and equal reaction should apply and force the rear wheels onto the track .Never seen if it works or what happens under breaking . Maybe I might ressurect the idea and see

Food for thought.   Steve