Sorry, that was more about trackstands then wheelies I guess. Side to side wheelie balance is a weight issue, for/aft is about power control especially on a fg. Trackstanding is pretty much all power control. Thats why we can trackstand easily but have trouble balancing on a bike with no chain. Either way riding on rollers will help you hold a straight line between to buses better then any fg trick I know of. XC riding would probably be the best way to hone these skills without all the danger. Why the **** would you cut between two moving buses anyway?