I thought two more A23 tester plants showed pre-flower ballsacs, so I placed them both into flower in 2L pots without up-potting.
Both surprised me by shooting pistils a little while later. But then a few days after that one of the plants added ball sacs to the lady parts. There are a dozen+ ball sacs all up and down the whole plant, even the top nugs. It got the chop right after taking these pics
My tents have had some issues with herms, but its not any of the typical stressors (light leaks, heat etc). The herms might be triggered by the upright fan, the light intensity--or both. I do believe there is a genetic tendency to herm on the plants that do. My best guess is that its a combination of all the little factors coming together and causing the herm.