Originally Posted by
Polaris OBark
He said that particular derailleur in the Shimano line (despite being 11 speed) had the matching (correct) pull ratio (see quoted text). My main involvement in this was to supply the money, but it is now working, possibly better than the original, according to him.
Oh, I gotcha now- 2 times thru and I pick up on most things! 11sp Shimano = 10sp Advent X ratio.