@scrogathon Looking at your pictures you have plants of all sizes growing , few variables to consider before the flip to 12/12
will the small plants remain in there when you do?
Will they have enough light to be viable if you do leave them in
Are you planning on tucking the branches under your net once the stretch begins?
Those bigger plants could double or even triple in size by the time the stretch is over so those are the issues for you to consider before the flip in my opinion