I doubled up on the brake clips on the Black Widow back in the day, and bent the clips farther out so they'd have even more tension, and that car would roll forever. When I had it up in the air adding the extra clips, I spun the front wheels, and they spun for a looooong while!
Never got around to adding any for the drums in the rear, but the front clips definitely gave me extra roll for P&G/EOC
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