I bought an Endura a few months back. It would push cut paper, and shave like hell. When I sharpened it, I was never able to get it back to that level. Fast forward, I now have a combo edge 710 Benchmade. These are different serrations that Spyderco, obviously. What is the best way to sharpen them? I love a Sharpmaker, but it didn't do it for me in the serration department. Is there a different way you guys like on something like this? David, where are you at on this? Thanks guys.