Got a question on the cable routing for those who are runing mechanical groupsets. Do you guys run cable housing inside the whole frame?
Yes, I run a outer cable over the complete length and used the so called SRAM cable guide (even if it is Shimano FD) to end the outer cable inside the frame with a Shimano end cap. Then I used a cable liner to protect the open cable from dirt and water. See attached picture.
Inside the frame I also covered all cable outers with foam hose to avoid cable rattling.
I don't know if that is the best way to do it, but it works very well.