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Oh man, I LOVE the idea of using the actuator on the drill press. Mine's still sitting here looking for a new use too. I had the same thought about the tread belt too. :)

That I did!

Mine was sourced from a free treadmill, and was a 1.9hp DC motor. When it worked, it worked perfectly. I more or less followed this video to wire up a controller for it:

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As long as you don't hog down too awful hard on it, that just might work.

Will you be using it for woodworking too? If so, be careful with the dust collection. One of the guys on the FB group...

How much oomph does the motor have? I've heard that 1hp is more or less a minimum for a 2x72. Mine is a 1.5hp and I don't think I'd want to go lower than that.

The other thing that came to mind is...