It may be possible to twist one but breaking an axle probably is not going to happen regardless how good the track prep is. The strongest E55's barely twist them and they are pushing alot more power than we are.

If anyone was going to break them it would have been MDSRT6 with his 10 second passes. If they hold up to that, then numerous 12 sec passes aren't going to hurt them. As Distantpulse said I have lost count on the number of passes I've made and 95% with drag radials and mine are still fine. It's probably somewhere nearing 400. At some point something will give, but that's the price of playing.