I just wanted to thank everyone again for all the information I have got on here. I posted a couple weeks ago that my son won his pack derby. We had the council championship last week for the top 3 racers out of all the council packs and he took first in that also. Then we had and all scout championship for all cub scouts and girls scouts and he took 1st place in that. I also helped a friends daughter with her pwderpuff derby car a couple weeks ago and she took 1st in her troop then took 1st overall in the county also. We still have a lot to learn but we have came a long way in the last couple years since finding this forum. Thanks again for all the help!