I dunno, Capt Jim, I guess he was lucky. If he says he put the weights in with 5 min epoxy, he was there and I was not. I am bumfuzzled. My only conjecture is that the epoxy went in with imbalanced or un-mixed components, and never cured fully. If there were significant amounts of residual unreacted molecules in the matrix then it would probably be gummy.

Either that, or everything we know is wrong.