For anyone with a pitted NDS cup in their rear hub (naughty, naughty!) or front.
Yesterday I whacked a good one out of an old hub and then used that to replace one in a different hub (in a wheel). Couldn't be simpler really, just like changing bearings in a Hope hub except you don't need to support its outside only.
Many mechanics won't have a ****ing clue about this process, although it was standard for Campag hubs (not sure about their newer ranges). All you need is a spare hub for all the parts - not even necessarily the same one, and often available cheaply (moreso than a Hope rebuild kit for instance).
So that's that debate won then? *dusts hands*