Many Thanks, Utopian and Stu.

I notice a huge change in keenness depending on what I use just before the asagi.

Most recently, I tried a nani 12k before 50 strokes on the asagi (a very slow but pleasing stone). 'Among the best edges from a razor that was lackluster at best. If I may use HHT for reference, the N12k only gives an avg of 1/2-3/4 bump in keenness indicators over the coti (LPB or Dressante), but the difference in shave is much more dramatic. I may be expecting a feel from the coti its not capable of producing, or that I lack the skill to produce. It may be as simple as the full width of the N12 is easier for me to keep a high quality stroke on, compared w/ the more narrow (2" max) cotis.

Thank you both for your thoughts. I appreciate it.