the iwaver boards are still much better than the evo boards.
track cars are all about bringing the weight from the top to the bottom of the car so it can handle better.
a RWD car needs more rear traction, so you'd shift the batt pack rearward. a fwd needs more front traction, so shift the batt pack forward. AWD has traction, but tends to spin in xmods, so shift the batt pack back a bit.
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