OK,Great choice ,you will really enjoy your new Mayhem ! This is my answer to your question about what to buy next. Rechargeable batteries for transmitter and car, a fail safe,a good set of tools,after run oil ,and locktite(red + blue). Above all read everything you can get your hands on about R C breakin and maintance. Take the best parts from all the information out there in mags and internet and use alot of common sense .Have Fun with it ;it's a great hobby!