ORIGINAL: pvt_pile
Btw, the 1/18th scale mamba set-up is only $100. You're probably thinking of a mamba max...which is for 1/10th scales.
ok, easy way to rember the diff,
Mamba Max = BIG TRUCKS
Mamba (Comp, Comp X...), = SMALL TRUCKS (aka, what you have)
Hope that helps, now if only they made it easier