I agree with Eivind E 100% , I bought my son a rtr from the LHS and let's just say that my son now knows a lot more swear words than pre-car days. I then set about doing some research and found a local company that imports the GO engines and bought one from them as well as getting them to put the new engine onto the car and set it up. Since then we now have a car that starts when it should and GO's (pun intended) like a rocket.