I bought an 80s frame which I'm building up and wondering if there's a better way than letting the cables keep cutting into the bottom bracket shell.
For comparison, the red bike is my Bridgestone RB-2, which has a plastic guide.
Sheldon Brown recommends a scrap of shifter housing, which he says will stay in place due to the tension.
Elsewhere on the web I saw suggestions to try heat shrink tubing, or something called jagwire housing.
Sheldon also says you can drill and tap a new hole to install a plastic cable guide.
If you drill a hole, how do you keep the screw from hitting a sealed cartridge bearing?
For the scrap of shifter housing trick, does it really stay in place purely from cable tension?