I set the bevel of my Tosuke today. A considerable amount of metal had to be removed. In the proces a quite wide shoulder appeared on the omote side that sucks itself against the hone. As recommended by Jim Rion (who used to post on SRP a lot) I use a 7:1 ratio when honing a kamisori. 7 roundtrips with the omote side down to one roundtrip with the ura side down and so on.
Any thoughts on how to solve this problem?

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