I purchased a MM1000 about 6 weeks ago from a secondary vendor. I found that to be such an excellent tool that I ordered and received my MM8000 from Magna-Matic about 3 weeks ago. I felt confident when sharpening the straight blades, but my first attempt at sharpening a mulching blade made me uncomfortable from the start. I made only 2 passes and then decided to shut things down and give Gerd a call to discuss my technique, or lack thereof. What a fine gentleman! He first went through Mulching Blade Sharpening 101with me, and I immediately knew what I was doing wrong. He had me review the on-line video and gave further hints on getting a proper edge on the mulching blade. With my confidence renewed, I went back to the garage and, following his excellent instruction, had that blade properly sharpened in a matter of minutes. Thank you very much for your service, instruction, and an excellent product. Since then, I informed a friend that if his blades were properly sharpened and balanced, he would see a difference in the appearance of his lawn and any vibration in his riding mower should be reduced in the process. He raised an eyebrow as if to say, "Yeah, sure" but ended up bringing me his blades. They were really dull and out of balance. He had been using the old hand grinder to dress them up. I sharpened and balanced both blades and he remounted them on the mower. He said that the vibration is gone, the mower cuts better than it ever has, and the lawn looks greener. I drove by his place the other night and sure enough, the lawn looks crisper and has a more even cut. His neighbor asked him what he is doing different because of the improved appearance. He informed him about my service and I'll be getting a new customer because of that "curb appeal." That gentleman did say that he's never had his riding mower sharpened since he's owned it. I can hardly wait to sharpen his blades.