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snottyotter
Pretty sure flatmount are f/r specific.
I'm building up some a bike with some 2ndhand 7020 shifters. Seller didn't include the compression nuts and I had presumed that they would use the standard ones that my old r685 ones used. Turns out that although they seem to fit the thread they don't crush the olive and I need some special flanged compression nuts instead.... grr.....
Also looks like I need a special adapter for the bleed funnel....