Posting this as a separate thread, since this is a separate topic. I am interested in reducing vibrations from my 8" buffer. I added a speed controller to it's AC input, however the speed controller also reduces the torque of the buffer, I am guessing a current limiting device... I am interested in increasing torque while reducing RPM. Main goal is to reduce vibrations from 8" wheels, which correlates to RPM. I there a device that can do this for me? I would guess that I need a frequency converter, rather than current limiter, Any one can suggest something available off the shelf? May be even a gear reduction box?