ORIGINAL: flatout->
Have you had any problems with broken pivot blocks, A arms and popping ball cups?
I busted my rear pivot block after my front end lifted off the ground, flipped backwards, slid 20ft at full speed, and smacked a concrete pylon. Never broke an A-arm, and I had a ball cup pop once after biffing a curb pretty hard, but I popped it back on and all was well. That was the Speed-NT.