I recently switched to shaft 4WD, during testing I setup an experiment to show torque twist.
I suspended the car by its shock towers and had no wheels on it, gunned the throttle and hit the brakes and there was a noticeable twist... this is what I expected.
I then did the same thing again but with wheels and tires on the car, and the only 'twist' and reaction was front/back rotation just like all my previous belt cars. the weight of the wheels completely overpowers the motors reaction.
you can also produce a HUGE amount of 'roll' just using small amounts of steering with the front wheels spinning.
I also can't believe how you can find SO many reasons to loosely compare cars to the ZXS. the Losi JRX-4 or Proto-X only similarity is the location of the motor (central and to the rear of the car) the servo in the car is 'backwards' at the front of the car with the steering assembly over the top, the batteries are 'stick' pack that are bottom loaded. the diffs are mega wide with the belts running very much off-centre and it had super short 80's style wishbones. the Losi proto I believe contained lots of 'new' ideas and its downfall was because of the wide and 'big' diffs compromised the length of the wishbones and the height of outdrives.
another thing. I would certainly prefer the components in my car to have their CoG's used to place them as oposed to having them placed spacially just thinking of them as an evenly balanced objects
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