Originally posted by Nightbreed
easier to tweak? It's nearly the same chassis. 
By easier to tweak, I mean that after setting the tweak with a tweak board, the car drives evenly on the track. With the TC3, there were times I would need to adjust the tweak slightly off level on the tweak board to get the car to drive evenly on the track. Of course, that was likely due to me not having the lowered roll center adjustments exactly even, but that is not a problem with the TC4.
-Mike