Eric if you have the time leave that crt in the soak for a couple MONTHS, no kidding. I rushed one and had an implosion, not fun. it was the same deal the lens cracked a bit during the removal and my attempts to remove it just kept chipping more away. Then one morning going into the 9th inning is just imploded when I touched it.
If I had to do it all over again I would have left it sit for a year in the darn water if need be.
It was a rectangle, which I have done before. Maybe roundies are less implosion prone, just be sure to protect you eyes and wear protective clothing.
Seeing that crack lens brought back bad memories
http://www.youtube.com/watch?v=lRJ0otqgmYs
The problem I had was once the lens was cracked I had a hard time getting a good edge to apply the wood wedges used to pry off the lens, it just kept cracking off into small pieces, right up to the good solid PVA, which makes it hard to dig out and have a space to work with under the lens.