oh, one more thing. i notice when im running fuel is on top of my tank. i got the rd logics blue aluminum tank with an aluminum fuel tank cap. i even bent the spring that pushes the cap down to make it more tight. if i tip the truck upside down, it dont leak. but its like a little fuel is some how leaking out through the cap. i got the o-ring on the bottom of the lid. but i notice when the lid is closed, its night tight seal. like when you open or close the tank lid you should feel the o-ring rubbing the inside of the tank collar. but i cant feel that. but like i said theres nothing coming out when i put fuel in the tank and tip it upside down. im thinking the pressure from the exhaust blowing in the tank is causing like a mist of fuel coming out under the tank lid. and ideas how to stop it?