I was just wondering if it was possible to fit the 6870 Di2 on a 2012 Cannondale SuperSix ? It has no internal wiring. I think the 6870 Di2 has a new round long battery that only goes in the seat post. I don't think I could get a wire out of the top of the seat post.
Here is an internet picture of my 2012 cannodale supersix
I was told on another forum that the battery should fit the seatpost.
I guess I could drill a hole in the frame but it would void the warranty.