I havent really "watched" a cvt in action, it was very informative. We put 3 different springs on it, and maybe 4 variators and 3 different drive faces on it. Along with different weights. I figured out to make a wheelie machine you just put a super stiff rear spring (2k) in and light front rollers( less than 40g), of course it will destroy your belt but man is it fun to pop a wheel with just a slight turn of the throttle.