I just got the bottom one finished about two weeks ago and hadnt got to play through the pair yet with anything other than a few CD's.

I was waiting on a new gasket for the other 15 & then they were going home, I was probably two days away from getting them out of there!!
The two I had/have a the short & squatty knuckle buster style.
I'll never know for certain, but I'd guess it was exposed for an hour or two.
Maybe tomorrow I'll get'er opened up if I can keep the tears/nausea in check!
Thank god it was ported!! if the stack wouldve fell and the rack hit the ground/got wet I wouldve probably required medication & restraints for awhile.