There is an Edgemaster Mobil Knife Sharpener at our local farmer's market. Using some sort of "belt sander" type machine, he sharpens your knives while you peruse the market. Edgemaster is a franchise, so I'm sure they have these vans in other cities. Has anyone had any experience with one of these people sharpening their knives? If it's a good system, it sure would be convenient. If it's not, I'm off to get a set of Kenji's sharpening stones.