Yea, I say just keep them as cloudy as possible and hold it off as long as you can, it's really all that can be done at this stage, either give up and ripen, or try keep building on that last little bit, I've really noticed this grow that you can still keep growth rates proliferating all the way until virtually the end, as long as you keep good control over what's happening at a soil level and keep transpiration creeping forward. It's like some plants don't want to give up, and hang in there.
Keeping an maintaing excellent nitrogen among other nutrient ratio's are key helping to killing it at the end. I used to kinda dismiss nitrogen toward the end as more of an afterthought, but not after this grow.
I am so done with using premixtures at the end.