Roadster, never thought you were, boot and other foot maybe
However the practice of upgrading an airframe was one I saw the USAF did frequently with the Buff though they did stop short of re-engining the beast and I thought we threw airframes away too soon.
But with the Nimrod it certainly had lots of corrosion issues on the Mk 2 in, IIRV, the galley and the toilet area. Same stable as the Dominie and when they took that apart they found that the hidden parts of the fuselage had bad corrosion and had never been painted properly.