well the rear aluminum hubs are a must have in my opinion the 1st time i ran my crt both hubs broke on the same small jump. plus i went through 5 wingstays to. well last weekend when i got home from a race i took the radio/engine/shocks of the truck and put it in the dish washer for a good scrubbin and then sprayed it with wd40 well yesterday at an indoor race i barreld rolled my crt down the straight a way and broke nothing! the hot water and heat cycle from the dish washer made my crt much more flexible!