Let me give a small example of Mods that would ease the way. The retired Vulcans were delivered to their civvy owners with the early 50’s design Intercomm boxes fitted, and I’ll bet money that 558 still has the originals. They had one valve (US Toob) inside. Now Intercomm boxes, if they work at all, won’t get any attention from the ‘get it flying crew’. But Intercomm will be an unofficial MEL No-Go item. You try and find a new Toob when the Intercomm goes down half way through a display tour. You won’t do it. Now’s the time to fit a modern, but not too modern, Intercomm and new wiring. Cost of (used) parts, £700 should do it. Guaranteed availability of spares - a telephone call away. And I may even volunteer to do the mod and install drawings for free.