VP did you, or have you since encountered any problems with firmware integration using the old EW67-A-E junction? I'm considering doing something similar but have been cautioned by Shimano that the EW67-AE wont be getting firmware updates and is actually being discontinued.
Short of using the EW67, has anyone come up with a good way to hide the 5 port they'd be willing to share? I was a little disappointed that the new 2014's didn't make any attempt to address cleaning up the front Di2 junction, and in all their photos they just have it zip tied on the bottom of one of the aero extensions.
Where did you put the 5-port junction box?
The 5-port junction SM-EW90-B was too bulky so I opted for a SM-EW67A-E and two extra SM-JC41's instead:
The SM-JC41's and all cables are stuffed inside the bars. You can see the SM-EW67A-E near the stem in the frontal photo.