Mine is the Ken Onion belt system. I was watching the demo guy, and he said use blue tape on your shiney knives to keep from marking them. I've sharpened a half dozen knives so far, all of different blade profiles. It is taking a bit to get used to but each kife has turned out amazingly sharp. It's quick, too, given that I'm reprofiling the edges. Gotta keep playing with it........thanks gang!