If you go with a smaller lighter setup, like a 5000mah pack.. you might want to do a single brick pack rather than a two pack setup in the maxx. Just put the pack on the opposite side as the motor and esc... it will make a simpler install etc.
Jammin CRT MM/Neu 1515 1700kv
Losi 8IGHT MM/Neu 1512 1900kv
Kyosho 777
T4 MM 5700
B4 LRP
XX4 MM 7700
old losi xxcr, MM4600 4s lipo 70mph+