I like the way that the initial bevel from the nakayama kiita contrasts with the second coticule bevel. The coticule scratch pattern shows up nicely. I would be curious to understand the interplay between the scratches from the first bevel and the second when the unicot is performed on a single coticule. I still can't get my head around why, with certain stones, the unicot edge I get is so much sharper than a dilucot with the same stone.

Bart covers it in his original post:
https://sharprazorpalace.com/advance...le-honing.html

But it would be nice to be able to visualise what is happening to the metal. My guess is that the scratch pattern on the second bevel would intersect with the scratch on the original and even out the edge. Much like two hatching patterns on the shading of a drawing coming together to form a hard edge.