I just got around to using my Oregon blade grinder for the first time. After 17 years previous, I've never used one, but I thought I'd give one a shot. You know, running out of things to buy for the business. Anyways, I set it up with a new blade. The bevel on the blade was even with the edge of the grinding wheel. Meaning the edge of the grinding wheel was touching the whole "slant" of the blade. I then took a blade that had been used, and ground it down. And ground some more. And ground some more. All in all, ground about a full minute +/- on each side, and I still didn't have a real sharp edge on the blade. I COULD see that the front - dulled edge was getting thinner, so am I doing it right?? I realize that I probably let my blades get too dull to begin with, so I'm just wondering do I need to run these blades through the sharpener this much??? Probably even a little more?