I have a Tornado XP and for the most part its been pretty good. It's done more cartwheels and flips than I can count,one head on with a curb and one head on with a cyclone fence post and smacked it hard enough to bend the tip of the chassis and pull the exhaust pipe forward right off the manifold without breaking anything. I'm working on my second quart cause I only run when the weather lets me,that and the engine has been a pain in the butt to tune but thats partially my fault,and the engines fault to! I swear this things engine hates me... I'd rather go pop some 7.62x39's through it and go buy an O.S rather than mess with it anymore cause this thing has really hit every nerve in my body (but I'll try a few more times,armed with new knowledge... but after that... If I get no cooperation this purple headed sucker is going down!!) It is hella fast thought,finally loosened up second gear enough that it shifts and shifts well. Got almost a quart through before the stock clutch springs broke (have a spare though). Stock clutch bell and stock spur gears still lookin good.