dowg, xray is notorious for doing the research on setup. the box stock setup is the best place to start. tires are tricky but a set of sorex 32's (rubber) is most common in the summer. for parts, hobbytown westminister carries a fair amount, but i would go to ashfordhobby.com, robert does alot to help the club. your rollout for a 10.5 should be around 1.65. and min weight is roar 1525 g.