I use a trf418 but my friend who drives the xray t4 likes to crash, a lot and he never ever breaks. Maybe 1 break every 15 track outings.. Where as my trf418 breaks maybe one time every 3 track outings. Most of the breaks are front chubs. Iim an ntermediate driver and my friend with the t4 is still in rookie class but will bump up soon.
Xray parts are much more expensive though. I'm tempted to switch but I'm very happy with my trf418/tb04 tamiya TCS.