I'm sure the fNWA guys remember that the Avros that Mesaba had were grandfathered by tail number. Anything happened to one of them there was no replacement.

Why can't we start to work in a defined number, each a specific ship? As those planes get older they will be replaced, maybe a long way down the road, but they will be. Get it back to any replacement aircraft will not be capable of carrying more than 50 pax.