I would also be worried about the controller, 6S is alot of juice. Your truck with an 8XL and 4S lipo will be plenty for you. I have a LSP-R with an 8Xl, MM, heatsink, mount, 2 trakpower 4900, and it weighs right at 4.7kg, a little heavier than a stock nitro LSP, probably due to the aluminum arms. Geared conservatively it does 40 easily. LIPO batteries offer the best acceleration of ANY power source, get some LIPOS!:018: