RE: E maxx crawler
or you can do what i did.
1 silly putty in diffs.
2 make wheelbase (make some sort of extension between chassis and bulkheads)
3 grind stock a-arms upper and lower to allow then to get more flex and then mount the shocks on the upper a-arm (drill hole in arm) experiment with different mounting places.
4 take foams out of tires
5 buy integy 55t lathe motors (extremely long runtimes) LOADS of torque
6 maybe like a 13t -72t gearing
do the one battery mod to the EVX and run one lathe motor and one battery.
7 lock tranny in first gear by gluing the first gear gear to the slide thing and gett rid of the shifting fork and servo.
8 buy a hitec 645 servo.
go have fun!
PS if there are any questions on how to do this stuff just PM me or something or post it here