I have two wheel-sets. One has an 11-34T and the other and 11-36T. Mine was DIY, and I previously had a White Industries 46/30T crankset on there, so I was fairly confident I could make it work.
Originally Posted by
Koyote
any good shop would’ve tried it first with the existing fd. There’s no reason not to.
Shimano says don't do it, and bike shops have to be cautious in those situations. (A more cynical motive might be to sell more Di2 parts.)