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Clutch! (sorta)
I'm not sure if this does anything yet, but here's the general idea.
The drive gear hole is enlarged so it spins freely on the axle. A slot is cut in the gear so as to accept a pin that extrudes from the wheel. Once assembled, the drive gear will have some "play" before it is engaged by the wheel pin. In essence, the motor and drive gear start spinning before the wheels are forced to spin.
I was hoping this might give the car a little boost out of the hole, though it might just cause the tires to spin easier... testing is definitely in order.
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