If you're taking the metal band off, definitely make sure it's "aired down". I believe that band is to minimize shrapnel if it explodes/implodes...according to this site.
It's a lonnngggg read, but we'll all learn something. I know I did. "A large CRT will have over 10 tons of air pressure attempting to crush it". Don't know if it's factual. Seems hard to believe.
http://www.repairfaq.org/sam/crtfaq.htm
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