I run a 50-36 on my CC for roadie season. Recently, I tried installing a 46t outer to see how things felt in prep for CX season. I also run a compact FD, and with the compact FD I had issues with the inner plate rubbing (pretty badly too) on the inner (36t) chainring when I lowered the FD to "match-up" with the 46t ring. If I raised the FD to eliminate the rubbing on the inner ring, I had a rather large gap between the FD and the 46t ring. It shifted ok, but it was not something I was comfortable with, or felt was optimal for shifting. I decided to use a standard FD when I reinstall the 46t when CX season starts.The Sundance Kid said:A compact FD may be a good idea if you have a big size difference and/or a very small inner ring.