thanks guys
@sam yeah, that will fit fine. i tried asking my dad about motor to battery power and what capacity i needed, but the figures came out at around 8000mAh, which doesnt sound right.

also, on a completely different topic, would it be better to build a melty chassis (which will need to take a battering!) from:

a one-piece, aluminium shape milled out for parts and the like,
a welded 2mm grade 5 frame,
a frame made from right angle steel and plates of titanium
or any other ideas, i'm open to anything!