I've got a foley I've been using for a long time. I keep my chains pretty clean (changing chains every few hours on a good day of cutting hardwood). When I put on a freshly sharpened chain, I certainly notice the hot knife through butter effect. HOWEVER, if I was to put on a brand-new chain, it would embarrass my freshly sharpened chain by the foley. My question: Is there any way to get a used chain (one that has PLENTY of life in the tooth) near as sharp as a brand-new chain?