Barrettscv 

I'm using a 105 series FD-5703 front Derailleur and older 5603 brifters. I also installed a system like this on my road bike and used a chain-catcher from K-Edge;

I've assembled the K-Edge Chain deflector for triple, Shimano FD-5703 front derailleur and the Shimano SM-AD15 clamp band for front derailleur (34.9mm size). The three part assembly is pictured below;





I was concerned that the K-Edge Chain deflector needed a braze-on plate to install, but it fits properly on the Shimano SM-AD15 clamp band. On the road bike I'm using the same 50, 39 & 26 crankset, but use a 12-27 cassette and a new 6703 Ultegra "GS" RD;