I use my rc's almost solely for the purpose of racing. Most hops ups I have on mone are for durablity and speed as opposed to bling factor //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif My sportmaxx is basically stock with the exception of the two speed, rpm arms, different cooling head ( couldn't change motor in stock class), MIP cvds and metal gears in the diff. I have finished one season with it, the only thing I broke is a wheel //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif