I received & installed the new battery & display. I notice that the new display has the Bluetooth logo on it. I connected to my computer via USB & downloaded the latest software. I'm no computer wiz (though I use them every day) but the Shimano user interface seems very awkward. I don't have it in front of me now but I was having a very hard time trying to set it up. I think I finally got it to recognize and accept the battery, display, both shifters and derailleurs. However, when I choose the Road type of bike, the options for the chainrings don't reflect what we have (52 x 34). Also, the cassette doesn't match what we have (11 x 36). Not sure this matters. When I thought I had it set up to at least test the Synchro function, the display shows an "M" (manual?) and the shifting is as before. I wasn't expecting to have to "hack" so much. I just want to have what I understand to be the full synchro function. I may give up and take it to an LBS where I hope one of the techs is Di2 savvy. Is this what it is like living on the bleeding edge?