Wheels ........ My two cents. I have mentored 4 different scouts and their dads and they have all finished 1 in their packs and districts races and when racing against each other, finished 1 2 3 in last years council race and 1st and 4th in this years council race (4 needs to make a few necessary design changes ie: wedge; the two other scouts did not participate in this years council race) ALL using stock wheels right out of the box completely untouched, all with different mold numbers AND with BSA zinc axles (last year) and BSA SS standard axles which were legal this year. They waxed cars with aftermarket lathed wheels, BSAX wheels, super grooved SS axles, parents trying to push all the limits, etc. I was one of three inspectors at the Council race inspecting cars - we saw it all. And ya know what, they won fair and square following the rules beating cars who were trying not to - what a concept! Playing fair. My advice ........ spend more time building a better car, perfecting the process of prepping your wheels and axles and spend less time trying to bend the rules. You and your scout will feel better about winning.