i use the alza centre diff buddy and the alza servo mount and alza 5mm tvp's.i put my esc at the front on the alza servo mount,seems well balanced.motor fits easy with room to spare.i run 13t pinion and 48t losi centre diff,temps are nice on 4s not tried 6s.
i also got rid off the double battery trays,so i can run 1 x 4s instead off 2 x 2s to make the truck a little lighter.