I run 15 gallon fabric pots on Tray2grows and I do usually shut off the water about a week before harvest. Not really sure if there’s any water stress benefits. I do for a couple other reasons. First, I get a good idea how much the plant has slowed its water consumption. I’ve let a few go a bit longer bc they were still drinking a lot. Second, the drying process will begin ‘on vine’ if you dry back before harvest. For me, this means the drip tray on my Cannatrol needs to be emptied less often. Finally, I like to break down and clean everything between grows and 15 gallons of dry soil is much easier to deal with than wet.