I learned from my Dad and his Dad on an oil stone. Every blade is different. Steel and shape make all of them different. For example a old high carbon steel (think older Cases) takes a lesser angle and a Swiss army stainless a little less angle. The stainless when sharpened to a fine edge will actually fold over when over done. It just takes practice.

I don't need a system, Just feel.

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Dum vivo cano