Originally Posted by
Sixty Fiver
I... and like Berto said, it shifts poorly but it will shift poorly forever.

LOL!
I used my NR RD on a bike camping tour. I had a 14-28T rear and 42/52T front. I worked perfectly well on the 28T rear but, honestly, that was it's absolute upper limit.
I have a Cyclone squirreled away in a box of parts. I believe the jockey wheels have radial cracks from age. It is very light in weight.