I love this car, the only prob i have had so far is the steering servo horn got broken, i am not sure if its the end point on the steering that needs so be decreased or what. i have no diff issues so far, when i built the diff i realized that the inward and outward movement of the cup joints were way too much and shimmed it with .2 mm shims underneath the pin that keeps the join in the diff., havent got to run the car in a race yet though but i like the car in every section of the track its stable every where. does anyone know if there is a metal servo horn to replace the plastic steering one that comes with the kit?