I wish to share my observations from this summer regarding OEM "blunt" edge sharpened blades vs. shop sharpened "razor" edge blades and see where the debate takes us. On my new Exmark Hp 56, the OEM high lift blades came sharpened at 33 degrees and a somewhat "blunt" edge. I mowed about 25 to 30 hours with these before changing out. The blades still looked good and the cut was excellent. I replaced with another new set (to alternate sets) and ran another 25 hours +/-. I then replaced the second set with blades sharpened in our shop to the OEM 33 degrees, BUT, with a razor sharp edge. After only about 6 hours use, these blades showed a few tiny nicks and a small amount of "folding over" or metal ridge on the blade bottom in places. I did not see a cut quality difference between the "blunt" and the "razor" edge. No tearing and/or tip browning with the blunt blades. I'm wondering if the few guys here that recommend sharpening to a "blunt" edge are more correct? Maybe the best sharpening procedure would be to grind the edge to your preferred angle (30 to 33 degrees), then "dress" or "break" the cutting edge with a hand file to maybe a 45 degree or other angle. Any opinions???? Sharpen a razor edge every 8 hours vs. every 20 to 30 for a blunt edge????