Always provided suitable covering/protection measures are in place and adequate transit arrangements made then I cannot see any great problem in a system of centralized servicing. As a plus, it certainly places a good pool of focused technical expertise in one place. In the early 60’s I remember removing seats from Canberra T4’s (a pig of an installation btw) after which they were transferred a couple of miles to/from the seat bay in the back of a land rover usually resting on the vehicle seat cushions (or whatever else may have been handy); hardly the best way and in all probability the transport arrangements nowadays to/from Marham will be a considerable improvement. Provided appropriate arrangements are in place for the transit, I cannot see a great issue with centralizing the servicing and if a wad of cash can be saved then one should do so. As to time cycles between inspection/life of critical components, I am now a little too remote to comment.