Hello,
any updated in your build? I posted in several posts about internal routing frames because I had several problems with the installation of the outer cables routing trough the area of the stem to the frame.
http://chinertown.com/index.php/topic,3499.0.html I started using Juin tech F1 calipers with jag wire outer cables but the gap in between the stem and frame was so small that it made kink the outer cables.
On my second attempt I trim the spacers of the steerer to make the gap bigger and it worked better but as the outer cables were already kinked the inner cables were not running super smooth.
My third and currently attempt was to use cheap outer cables for the brakes that are far more flexible and now the inner cables run smoothly, but, I can feel that the outer cables are not so efficient as the jag wire.
My last attempt will be (as soon as I receive all the new parts) using jag wire outer cables all the way but with a small but of the cheap outer cable in the area of the tight bending.
Hopefully it will give me the best performance possible.