Originally Posted by Koyote

Hmm. Mine was also a clamp-on Ultegra Di2 11sp fd. Shop said they couldn’t get it adjusted quite right with the 48-31 crankset. Perhaps the cassette makes a difference? I was running an 11-34 at the time, which is pushing the limits. That, along with the one tooth difference in the chainrings, could be factors…?

But the real point is that any good shop would’ve tried it first with the existing fd. There’s no reason not to.