Looks good..
Consider your final pot height and add roughly 8" to your screen level. Keep in mind how your going to manage your runoff, you'll probably want to slip a container under to collect it.
LST and trimming away the undergrowth, you'll need space to work under. I find elevating the pot makes it easier than being so close to the floor, so long as you have the height for it. Being in a taller tent your good to go.
I use twine as well, as said earlier it's easy to cut away at harvest time.
Having experience with this strain you'll have a good idea on how much stretch to figure when screen is full.