The guys that run with me have them, I have seriously thought about getting one of there rollers for a spare
http://www.engagerc.com/servlet/the-...obby%2C/Detail and I have a definite new truck as my next racer
http://www.engagerc.com/servlet/the-...-Desert/Detail.
So far on the buggy and the truck we have only broken the same things as the 5b & 5t, the diffs have held up to 4.5hp+ and the shocks and suspension components that you break are the same as the HPI and replaceable with anything that fits the HPI without problem.