Thanks! I'm guessing everything has to be e-tube compatible for e-tube to work, just can't in my mind see how the cables seemingly being no different makes any odds to e-tube. Pffft. Know you've got several di2 setups, used e-tube?
Thanks for the previous recommendation to look at other/older DA di2 before. It's working well so far for me - I got a set of 7970 levers & FD, external battery, mount and some cables. If I can pickup a RD for a good price, then it'll be a di2 setup for <£250?!
I'll be then set to convert the turbo bike to 10-speed di2, I'll then swap the 5800 11-speed from there over to the other halfs bike to replace her old 8-speed. Crazy it's going to work out cheaper than buying S/H mechanical 10/11 speed for her. I also have part of what I need to setup mine to di2 but that'll be 11-speed. I have di2 785 shifters and a 6870 FD, just want an 8050 RD so I can run a 34t rear cassette... Have no battery or control boxes for that so it's going to work out quite a bit more expensive than the 10 speed...
Would you take a punt on a S/H internal battery, or are they the sort of thing which fails/is buggy/problematic so always best to buy new?