The car fully loaded w/ the body weighs about 5lbs. I think you're right about that part. I can't really freely spin the shocks, but I thought for strict speed that didn't really matter. My droop setting seems perfect, the tires are nice and even. Upon just hitting full throttle, it always wants to turn left, but other than that, I would say the car is generally pretty controllable. (I am running 2 spools) Maybe it is a weight issue, so would that mean there's too much weight on the right, cause then more grip to the right means leftward turning. Maybe I am overthinking it. I need a good place to start running, how many ft. do most people like to run with? I can work with about 1200ft, about 1/4 of a mile.