when you say bottom out, you mean like chassis slap right? well how high is it when the chassis first starts to slap against the ground? i mean you dont want suspension that is so stick it cant take the bumps, but you dont want it so soft that it cant take a jump either. actually my brother just rebuilt his stock e-maxx shocks. the factory ones, and he put 50 weight oil in them and it does great. its a good combo of stiffness for jumps and soft for runing on the rough.