Don't listen to those harvest guidelines from the attitude, they said my auto white rhinos were a 75 day strain from seed, i'm on day like 97 and have a good 2-3 weeks to go. You have quite a while longer. Never guess on when to harvest, just check your trichomes, when their 20-30% amber pluck them. No idea about the dry weight, do some searches on that particular strain and see what others yeild on a similiar setup. Your temps seem pretty good. What brand of nutes are you using? BTW, your amazon link is bad. Order a 4x4x7 tent from ebay. I just got mine for $120 shipped. Good luck man.