Ah ok now I do of course see the angle difference, was just hard to spot without the guide lines! Thank you for posting this it's very interesting. I was under the impression that the coticule edge would be just as straight as an edge off a synthetic hone as when you go through the dilution stages you get less and less slurry dulling until you finally arrive at water only and you polish the edge out to its max keenness limit. May this is incorrect though I am open to correction!