I zipped up to HomeDepot this afternoon to get a couple of mower blades for the red heads' riding mower. I also picked up one of those blade sharpeners. The kind that has the cone shaped stone and the plastic piece on the end. I used it on the other mowers blades and it did a good job. Better than my usual freehand with the angle grinder does. I am quite impressed with the way it keeps the correct angle on the cutting edge and sharpened it right on up. I always wear safety goggles, there was the stone dust all over my face/arms and boy does that stuff itch! I'm going to try it on the 5' finishing mower the next time I hook it up to the 8N. Shouldn't be too hard to use with the blades still attached. Anyone else use one of these contraptions?