Vertical scrog - plant height and diameter, and screen set-up questions

Hello there.

I am building out a two level 5x10x7 space for a vertical grow w. two 1000 watt lights. My strains are super lemon haze and sour diesel. I will be growing in an ebb & gro bucket system w. two controllers - one for the bottom row and one for the top. I intend to grow 20 plants and they will be at the perimiter of my room. This allows a 2x2 footprint for each plant to comfortably grow in, which seems reasonable. The questions:

-How tall and how wide in diameter should I grow in veg. prior to switching to 12x12? I am trying to maximize returns while avoiding an overgrown mess.

-Which do you believe will be more productive - building individual wire frame cylinders for each plant and rotating them 1/4 turn every two days or simply putting them behind a screen and letting them grow?

Thank you for your thoughts.

trust me let themgo into a screen. Otherwise it takes time and energy to re focus its direction. A split decision Is to turn til week three. I use trees and bushes below in the cracks. Garden trelees screen is great and managable but not durable like chicken wire. I like to use bungee cords to hold the garden screen . Turn only if they are big around.