If you pay for a custom bike the manner in which the cable tunnel is done is a separate choice ..

a stainless steel tubing Silver soldered inside where it penetrates the tube, top or down,

and running uninterrupted housing through that will make the service simpler .. just shove it in till it comes out the other end..

Di2 electronic wiring plugs and such can be tunnel routed as the carbon is laid up in the mold ..


your wallet your choice.. Ill take a Pass, myself..