MossyMo, fine looking grinder you have there. But here is a suggestion that my son and I used when we made ours. They are both gear reduction drive that you spoke about, and wired in a dead man switch(foot pedal that the operator has to step on to make the motor run) and only one person is allowed to feed and operate the grinder. This way if the operator moves his or her foot for any reason, the grinder stops. Just my .02 worth for safety.