Maybe it's best to leave the C3 & C4 cars with the original game performance. As for the racing school cars, if possible, separate them from the normal road cars and leave them with the original game performance as well. The only problem in that scenario would be the car classes in the licenses, but if the car's are separated you can change that. I like the idea of replacing the racing school cars though but that would be too much work and you guys are already overloaded with work, so forget about that. Waiting for more feedback.