Originally Posted by java230

Anyone know what the extra pieces they send with them are? The ones labeled 2.0, 2.5, 3.0,with some arrows on them.

Originally Posted by amospetrie

OK so happy to announce the cutback with the optinal spur and 17t pinion is night and day from stock. I lost the o ring for the center rear driveshaft so i cut some nitro line to use as the o ring I left no play in the driveshaft I installed 17t pinion and optinal spur it gained at least 10 MPh it doesn't nose dive anymore and I can control the flight wthe throttle I did nothing to the suspension. Nose dive issue fixed