The general
rule among people I know is LEAVE THE TUBE ALONE. If you have
two units, one with a bad tube and one with bad electronics, move the
electronics, not the tube. etc etc. Handling a CRT is just too dangerous.
Now, what does the FAQ say about there being some clueful people here ? :-)
CRTs are not _that_ dangerous if you know what you are doing. I must have
handled a dozen CRTs in the last month and I am still typing with all my
fingers ;-). Sure, they can be nasty if you are careless, but that
applies to just about everything I work with.
I do something stupid at least once a day. I like to play with dangerous
toys, but I also know enough about statistics not to make the habit too
regular. If I was working with CRTs a lot, I assume after a few weeks if I
lived I would develope some level of skill, but as a tinkerer, I'll pass.
YMMV