Threading Rear Derailleur Cable


Well, I'm almost done with this bike. I'm short a barrel adjuster, but the most important problem right now is how to thread the rear derailleur cable. Here's the response I got from Skip who runs the vintage Trek site:

Hello Richard -
I have wondered about that myself. Hmmmmm -
Perhaps you can use a vacuum cleaner hose to suck a thin string or thread
through the stay, while holding the bike vertically. Then tie the end of
the string to the cable and pull it through. Sorry that I don't have the
definitive answer. If you do get something to work, please let me know.
You could post the question on the vintage light weight discussion "list": .
Good Luck!