Ok you cannot make a rustler competitive even if you are a pro driver. I tried everything from motor to screws to shocks to chassis. Trust me I tried everything. Then i tried my last option and I bought my RC10Gt not any other st out their like it so nice fast and durable. WOW. I havent lost a race since and im only 14 years old. The reason a rusty is not suitable for racing is because it is back heavy. (too heavy in the back of the car)!!!! Which makes it pop wheelies no matter what motor. When you take turns the wheels are barely touching the ground so it wont take sharp turns like you need to in racing. I could tell u 50 more resons but i dont feel like typing any more!!! LOL Just sell it for and rc10gt!! Thats my advice!!!!!

Drew