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@mashton it does also matter what brake levers you have - Shimano have had a few different 'standards' over the years that are slightly different from the 'standards' that campag and sram have.
(not-so-)mini-Vs like a CX90 (with 90mm arms) won't be good with campag/sram but will work fine with newer shimano (mostly 10spd+). The slightly shorter CX84 (84 mm arms, similar to Tektro 926AL and Shimano) work well with all of them.
Do I need on wife those fugly pulley things if I swap my cantis for mini v's? Charg Plug 1 SS, with drop bars and levers....