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Originally Posted by SenorZ

It would work. But how are you keeping it from losing contact with the hole in the hex shaft? Pressure fit? That would make it hard to swap out if needs service.

See if you can pressure fit a gear on to that shaft, and another on the hex shaft. Mount it gear-to-gear.

I didn't think of that. I've heard of people using part of surgical tubing I believe so it can turn, but a gear may work even better.