You need heavier springs to help against bottoming out. The Revo springs fit as do the Jato. Run Revo (front) green springs up front and Revo (rear) white springs in the rear with 40 wt. oil. Mine has jumped a lot better ever since. A little stiff, but for big air it is great. Laying down your shock angle helps too, inner holes up top, outer holes on the arms, but you lose ride height unless you crank down the preload collars on the shocks.