Sprint, I have great difficulty believing that your car is as bad as you described it, because if it is that bad and I had purchased it I would be taking it back to the shop very quickly for my money back or a new model.
And posts like this create a problem. To be fair to Sprint, he is just one member that I selected to press home a point, and I apologise for making him the scapegoat, but there are many forum members who are very quick to complain about problems they have with cars, but do not seem to be so quick to do anything about it. If 100 of you, just as an example, all had the same problem and all returned the models to your shops, the shops would send them back to the distributors, the distributors would send them back to the manufacturers or at least tell the manufacturers what was going on in order to avoid a repeat of the same problem. If you don't take any action, then you cannot expect change, as the manufacturers will simply not believe they have a problem.
Can you see what I mean? I am not saying to everyone make a fuss, I am simply applying the rules that I have when making a purchase of anything - slotcar, real car, washing machine, whatever - if it is not right then I want it put right or exchanged or I want my money back. Don't you?