Off topic tech question for Iron Pony..

This could be interesting........

 

Most certainly off topic for this particular forum. Why not a PM?

 

I think that a pedal rheostat would be the best option. Just duct tape it to your foot so you can move around......

 

I'd use a Variac... it's a variable transformer. They usually come with a on/off switch, rheostat, and a CB or fuse. If Granger doesn't have one, you can probably find it in Newark Electronics catalog. Since it's in your hand, you'll know, but the motor will probably start getting warmer than you'd like to run it at slow speeds.

 

A knife sharpener would probably be cheaper!

 

Good Answer, "Verbosity leads to unclear, inarticulate response...."

 

LOL,,,,,