The scout I am mentoring car won the pack with an average speed of 3.028 with prepped, out-of-the-box, untouched, wobbly BSA wheels using oil on a regulation length Best Track. Each run the car was getting faster and setting a new track record. But we are not sure if the dirty graphite track contaminated our wheels? Should we re-prep or hold fast. Another option is moving to a tuned BSAX Wheel that is lighter and true that fits our rule set. So do you recommend switching wheels with a fresh prep or sticking to the old? I think the smoother running wheels will add speed initially above the BSA stock wheel average and only get faster. All things being equal, do you think the new wheels can shave off .03 seconds? Thanks.