look buddy, i am not trying to argue, but I am saying that you are the exception and not the rule. This is truly the first time I have heard this, and as i said IMO, this is just my opinion, if I had a whole strain all go hermie in week 7, I would have to look at my situation. One of the reasons I switched to modular type hydro systems a while ago was because I found that putting different strains in the same system and treating them totally the same is far from optimal. From reading your thread, which is wonderful, you stated that you were more the type to just come in your grow room once a day to check the ph, but some strains need more attention then that.
You have to understand that I am not advocating everyone going out and buying femmed seeds, because frankly I would probably never BUY a femmed bean ever. I do however create my own femmed beans at times that cubing is not possible because I do not have the correct male, and at other times when I find 2 very special females that I would like to cross, as long as they fit the criteria. I have experimented with 1000's of my own personal femmed beans, and have personally taken them down to R3 and S3, and I have never experienced any problems until I get to R2/S2, and even then, just some of the plants are weaker and as such will hermie. Plants hermie as a response to something, not just because they feel like it. The problem is that unless you pay close attenion to all of the signals then you would never really know that your plants are not happy with a certain aspect of their life, because not unlike people, plants can be very good at hiding problems, if you are not perticularly looking.
But regardless, I am sorry to hear the bad news.