lol, way too many classes, lol. Anyway, I drive the motor I can handle. On my currently layout, I am not liking the 8.5. I can only use the speed on the straight. And the jumps are close together and a wheeler with a 8.5 is just harder for me to get right. We also have a tabletop jump with a crap ton of lift and it is way to easy to over power the jump and land in the fluff. Add to that my tires are getting destroyed. Tires are only lasting me 1-2 race days. And the guy that won the wheeler class last weekend ran a 13.5 boosted in a xxx-4 chassis. So its not like an 8.5 is a huge advantage.