Do I need EW-WU111 with EW-RS910 to have the ability to use the features of the Garmin? I see the EW-RS910 junction A has blue tooth. Can I use the Ultegra 8050(?) shifters "hidden" button to (for instance) change screens on the Garmin? Will the DI2 gear displays on the Garmin work via blue tooth? Do I need ANT+ from the EW-WU111 for any of this? The new bike has been delivered to the shop, and I dont get to see it until it is assembled, and of course they are way behind.... but I want to be ready for when it is ready. Why does it have to be so confusing??
