Have had to add a lot more stakes and support in the canopy. I've run these genetics 3x and never once had problems with the stems not being able to support the flowers. These plants do have a lot of tops, and I had one clone in week 8 unable to support her canopy before. But this started much earlier in flower. My topping-intensive training is definitely paying off. I have purchased a supplemental tank-based CO2, but am choosing not to run it until the next batch. I also recognize the need to build a scrog frame.