While I was riding this morning, on the creakvelo, I started thinking about how I would change the shifting cables when the time comes. I have never done this before and the RD cable goes into the frame. I was thinking I could unfasten the cable from the rear derailer and shifter, pull the cable out of the housing, sliding fishing wire through the housing so it is sticking out of both sides. Then pull the cable housing out leaving the fishing line behind, slide the new housing over the fishing line, pull the fishing line out and then insert the new cable.
Im sure I could have youtubed, but this is what I came up with on todays ride. Sounds like it should work. Thoughts?