OK, took the same razor back to the BBW with water and slurry ( Dilicot method ). 100 or more passes.
Then 50 spine leading with water, then 50 dry spine leading.
50 passes on Russian Tanned, 50 on Shell. A peek thru the 30X loupe, and the scratch pattern is very close to my B/G Escher. TPT good HHT good, shave test in the morning. I'm thinking its going to be a little better than off the Coti, but I'm not counting chickens.