Thank you guys! Just I'll have the right time, I'll do this operation!
What do you think about the possibility of glue again the safety screen?
I'd like make a work like the original system of to glue the whole screen surface, but I don't know what glue should be the best.
I've seen this video where at 2.15 minutes there is the glueing of the safety screen in a Bonded B&W CRT:
https://www.youtube.com/watch?v=t9hyE6jL1lg