ok my car is dialed with the stock diffs. with nothing in them. i cary alot of speed & it handles like its on rails. the only problem i have is with the motors. we tried afew orion motors & you get to get lucky to get a good one. the hpi is ok but i still like the xray motor best for a stock motor. i dont have any pics of the track so here is the link. www.mushroombowl.com these are old pics & the track was setup for oval in the pic but you can get an idea. here are afew pics of my cars.