Look up the unicot method on coticule.be.
I'll say that IME I've had very good results using this method. I'm a believer.
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I think that kind of edge is horrible cause it's seems to make the cutting edge get cogged with what ever
you are cutting into much faster. Flat ground edges are the way to always go. Unless you want a stronger edge for chopping in
the side of a tree with a axe then it's good.