FWIW, I use an FSA 50/36 (not a typo) with a Campy Record FD. While it has to be adjusted just right, it works fine. Before I made the switch to compact I called FSA (no waiting and a polite, knowledgeable person talked to me) and they said it would work with a 50/34 (no typo). FSA also covered this in the FAQ section of their website. You might try Ritchey's site or email them and see what they say.