Ok, based on your edit, I'll put the smartass comments about running mold experiments.....
But, just for humor's sake, here's a bit more reading, if you haven't come across it yet:
http://www.cigarasylum.com/vb/showth...ht=temperature
Oh...and once you do get it where you want it, don't sweat a couple RH points from day to day. You'll live longer.