poor judgement.... If the guy is lucky he will only break diff cups... I was talking with cen racing a while back about more powerful engines... I'm either going to try epic 18 or the cen 18... I won't modify my nt-16 because I want a spare anyway... With the .18 it can pull a wheelie on grass but I still believe it runs the risk of alot of drivetain damage.... I tried a quicker clutch and it pulled a small wheelie then bent (snapped) the dogbone on the right wheel.... IMO not worth the damage to parts for the little bit of thrill.....
I use my electric rustler (modified) to pull them... Will run full length of parking lot (has wheelie bar) ... cool to watch.. hard to steer.