Nah, I could care less to be honest. Even though it's got an NOS 21CYP22 in it, it's one of my 'expendable' sets. In other words if it goes down in flames, at least it wasn't a CTC-4 or something more rare. CTC-7's still pop up in the wild from time to time, and I really wouldn't be bothered to much if it failed. In any event, I have the screen controls set up so that when brightness is at max it's not riding the CRT too hard. Screens are only high enough to get a viewable picture with normal room lights, they go much higher than where they are currently set. That should keep people from running it completely into the ground. It's been there more than a year already, and it looks exactly like it did when I left it. I don't think it will have any problem going 'the distance', however long that ends up being.
Coincidentally, this should be proof that these old sets can in fact be run pretty much 24/7 by a novice without so much as a mouse fart- provided that they are set up correctly. People who know me will tell you that unless a set outperforms the factory standards, I'm never happy. So it was with this one. I got it to run less than the service manual calls for on horizontal output tube cathode current at max brightness, got more HV than the manual calls for, and even lent the museum my variac so it would always run at the rated 115vac called for in the schematics. I don't think I even degaussed it when I dropped it off, color bars looked perfect.
If anyone feels like swapping out my set for theirs, I doubt the curators would mind. Could be a neat way for the WI/IL crowd to get some vintage TV exposure for their sets, and who knows maybe some airtime as well? Even if it's only 'digital' airtime...