Seems like this forum needs a section on sharpening. I didn't find it if it already exists.
anyway, every knife, sword, axe, and spear maker and anyone using tools needs to be able to sharpen their edges.
i recently saw a video on the razor sharp system.
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i bought mine from the local woodcraft store. Used it several times and I'm very impressed. Easy and quick and sharper than I ever got before using stones, diamond doodads and belt sander with strop.