Normally I eschew electricity for sharpening things. I like the feel of sharpening. Human-powered jigs like the Hapstone, no problem, I enjoy that, but if I were to move to powered belts and wheels and such, I'd really be losing my form of the essential pleasure of sharpening. But I'll happily make an exception for this case. For background, the business part of a meat grinder consists of a blade piece with 4 "knives" formed into its surface (some are more blade-like than this), and a flat disc with holes for the meat to come through (they all seem to have this). "Sharpening" this system consists of flattening both of these pieces so that they are both absolutely flat, so that no meat, especially no connective tissue from the short ribs I am trying to grind with chuck for my dream burgers, can escape. The piece with the 4 "blades" is no problem, but those discs! I thought I'd have it easy, because my grinder isn't even a real grinder, just a KitchenAid attachment with smaller discs, and instead of the sandpaper used by the YouTube people, I had my diamond plates in 200-400-800-1800. It took forever to flatten the thing on the 200, which I'd thought of as a fast-cutting stone. 90 minutes, two hours, I don't know, and that's just for one of the sides; I skipped the other. My forearms are sore. This is not The Zen of Sharpening. This is just a big pile of work. So I am really open to a powered alternative, but I'm not sure what it would be. You want to make the thing absolutely flat, but you don't want to take too much metal off, or make it lopsided, as in not 90 degrees relative to the sides. Is there a way to use electricity for something like this? Or would the sandpaper have actually cut faster than my diamond stones?