[nativepaul]

Hi, lots of people get scale speeds wrong by just divideing the speed by the scale factor without taking account for the scale time, scale speed is actualy the square root of the scale factor. For a chalanger 2 that has a top speed of 38MPH its 1/6 scale speed is 15.6 mph not the 6.3MPH that seems logical at first.

Maybe Mike could make you some 7075 tracks that can take it.

As for the power system, at 80kg it would take less than 2KW to maintain the originals power to weight ratio, so a pair of XLs may be enough if you can gear them short enough to make enough torque. If you have the cash a pair of 3080s wouldn't hurt I'm sure.