its all trial & error i startes with a jammin crt x1 to the x2 ....x2 kept blowing diffs and steering was lacking..i switch to losi and it fits my driving style ...i drove the mbx6t and the is bannanas but im satisfied w/ $600++++++++ investment(include screws, bearings,minor upgrades) lol.. plus lhs is losi parts god they keep em' stock