Great! That looks like a cheap n easy solution.http://m.harborfreight.com/router-speed-control-43060.htmlI recommend looking for a drill with an adjustable trigger stop. This will allow you to set the trigger to the desired speed.
That's one of my biggest gripes about the Dewalt I use. However, since I got it on sale I'm somewhat tempted to cannibalize it and make it into a dedicated mill motor. Rigging up a more precise speed control would be pretty easy. Might not even be that hard to rig some form of PID control to set the speed.
If you could figure out a way to do this it would be great. I run my 1/2 drill on a monster mill and just zip tie the trigger all the way closed. It runs much, much faster than it should which shreds the husks.
I picked up this link from a previous forum post. It might be helpful for the zip tied drill. -T
Has anybody tried using something like this to control a drill for a grain mill?
This is exactly my set-up. Works great.