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Re: Differential?
Are you sure you NEED a diff?
Why not just drive each wheel from a separate motor/gearbox? If you are concerned about the wheels spinning at different RPMs, just use an old FLL trick and connect the two axles together with some tubing. The friction of the tube will help equalize the speed of the motors... it's in an FLL handbook/guidebook somewhere. I've got doubts, however that it will be a huge problem for you.
Jason
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