Purchased a Becker Brute last weekend. Played around on some wood planks etc. Dulled the blade and have been trying to sharpen but I can't get an edge on it! I've been using an Arkansas stone but to no avail. I don't have a diamond hone, prefer a stone. I like the size and heft of this knife but if I can't put an edge on it I think I've just bought mysef a $120 hammer! Beginning to remind me of a United Cutlery 420J2 stainless steel piece I've got lying around here somewhere. What's the trick? Do I need a diamond hone? I'm tempted to take a file to it, probably wouldn'tdo much good either. Any advice?