I just replaced my Truativ Giga X Pipe Triple chainring with a FSA Gossamer triple. The X-Pipe large ring had 52 teeth and the FSA one has 53. The problem I am having is that the curve of the derailleur cage doesn't line up with the curve of the chainring. If I adjust the height so that the back of the cage clears the front chainring by 1mm, the front of the cage is a good 7mm over the chainring. The result is that I can shift from the large chainring to the middle one since the cage isn't making good contact with the chain. The derailleur is an Ultegra braze-on and I can see any way to adjust the angle of the cage. Any ideas on how I can fix this?