I go to about 80% for mine. Just what works for me.
You are going to be in trouble if you don’t flip soon.
Sometimes the plant will harden off prematurely (like mine right now) and you have no choice but to crush the stem and supercrop. I had to take a pair of pliers to one of my mains a few weeks ago.
I spread and thread under the screen for the most part. There will be a couple of exceptions but I try to spread the mains out and I do like a good FIM to develop 4 diagonals to fill the corner. You will want to defoliate extensively under the canopy to avoid issues with mildew and to redirect energy into the better performing tops.
I also try to retain the lower branches and tight bend them up to populate the very center of the screen.
This plant did not cooperate so couldn’t perform that operation.