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Yes, thank you very much for pointing this out Glen. Certanly it can be useful to compare scratch patterns, and I do it sometimes too to get an idea of a new hones capabilities.

I think so too. Thats why I said that the bevel and scratch patterns do not tell you how good the shave will be, or how fine your stone is.

I might be wrong, but I remember that my coti leaves a bit of scatchy finish on the bevel, while the nani 8k near perfect mirror. While the naniwa looks better, the coti shaves better for me.

I don't think so. The 8k naniwa looks much better under the scope than a coti, but the coti edge is superior. The scratch pattern doesn't tell you anything.