First Attempt, mistakes were made...

Beginning week 11 they are still doing amazing. I'm keeping a constant eye on them for any signs of trouble but so far I've been very fortunate. A couple more weeks of flower i am guessing according to the flower schedule of the strain. This will be my first ever harvest so I have read what to look for but have never personally witnessed it by eye. I think maybe one more week of nutrients then switch to only water for the final two weeks or could I push it longer and what risks do I run if I do push it longer? *MID-WEEK UPDATE* They are looking amazing still though I am concerned about bud rot. I have a small odor of stale water but have none anywhere even sitting in the pots, the humidity stays down in the low 30's execpt one night where it hit 99 for a couple hours but since then it has stayed very low and dry. I can see no signs of rot but know it's hard to detect and with the smell I am smelling I am concerned. I have them in a tent with the door open and an exhaust fan plus two circulation fans now running on them now, so I hope I avoid any problems. I believe I am going to need to harvest in two cycles taking the main colas first and letting the lower plants finish maturing. I've never harvested before so this is all new and experimental to me so I appreciate all the tips I am able to learn and try here on growdiaries. thanks to all who post here.