Originally Posted by
Henry III
What would need to be done for it to accept 11T pulleys?
I don't know either, but I think it's a good idea. The old grey Campy pulley wheels are often cracked, so they need replaced anyway. My approach would be to order some 11T pulley wheels and play with them; once you have them in your hands, I'm sure you'll find it easy to figure out what they need.
By the way I, too, have a NR derailleur I'd be happy to turn over to you for experimentation, in hopes I get it back in modified form. I'd ride my next century on it, I promise!