Some issue encountered preparing for a Di2 frame.

There is Ideas on securing internal Di2 wires but there are more general issues that come up.

I've found 2 so far ...

1. BB shell hole sizes in the down, seat and chainstay, for internal cable routing.
on the Shimano Tech Tips page .... "10) Di2 Wire Kit Instructions.pdf"
Tech Tips
on page 19 it shows dimensions (BUTwith a big X across it ... ) all really hard to read ...
DT >25 x >17.7mm
ST >7 x >16mm
CS >12mm dia.

2. Is the Di2 Front Derailleur compatible with say Richard Sachs' braze-on FD mount with it's curvaceousness??
on the Di2 Tutorial
Di2 Tutorial
on page 12-15 it shows the need for a 'Seat tube protector' for brazed on FD mounts. The SM-AD79 Mounting Band eliminates the need for the frame protector.

Cheers,
Ewen