Since misery loves company, I corroded two Bflexes to death. Avoided acetic acid silicone as recommended by George but he did not recommend potting silicone. Got ammonia venting formulation when I asked for non acetic acid type. Should have done a 'corrode off'' with acetic acid silicone in one light. Also lost two XP-Gs in the light with the most silicone to fumes.. Anyway, potting-compound silicone is much better so far.
Good to know I could have thrown them in the wash and saved all the trouble assembling and disassembling to destroy Georges work!