I've seen systems similar to the Spyderco Sharpmaker, but most use round sharpening rods, I believe. It would be nice to have a good sharpener for my KA-BAR. I wouldn't dream of using the sharpener I bought for the kitchen cuttery on it; it takes off too much metal. On the plus side, run a kitchen knife through it 10 times and the knife will cut through anything on the table.
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