I also have a RC10GT RTR. It took me about 6 tanks of gas to get the engine in tip top shape before I could open it up. My upgrades were as follows: Titanium Turnbuckles, Airtronics AIR 94758Z Competition High Speed/High Torque Digital Metal Gear Servo(the RTR servo did not have enough power to get around the track), M3 Pro-Line tires (stock tires do not have enough grip for my local race track), RPM control cover (You do not want gas getting on to your electrics, and new gas tank (the design is just more friendly IMO, and make sure to tie down the receiver pack securely unless you want to shorten your truck when hitting the wall at full throttle.