Henry, On one of my bikes I am using a '71 N.R. rear derailluer on a 12-28 7 speed freewheel with a 53/39 chainring combo and a Sachs 8 speed chain. Shift levers are Campy downtube friction. Works just fine. The 53/39 chainring setup was an experiment to see if the rear derailluer would handle the gear spread. I didn't even have to add or remove any chain when I swapped out the 52/42 setup. The front N.R. derailluer worked just fine, too. And the best part is no clicking of shift levers so I could get a jump on the gang!
Steven,
Thanks for the heads up on the fork jig. It sure looks cool. Making a
fork jigs is easy, and domestic jigs are readily available. The hard
tool to make is the frame jig! If you see one of those let me know.
Jay Sexton
Sebastopol, CA