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sqzbxr speaks the truth: I analysed the geometry a couple of years ago and decided the best formula was 2 ARCTAN(t/2W) where W is the distance from the contact point of the spine to the edge (through...

You are so right Graeme. I've honed a dozen or so wedges and none were easy. Most of the ones I've dealt with needed 2 layers of tape at least to make the stone contact the edge, rather than a...