Wedding Cakes in 4x4 SCROG 55 inch tall - ready for flower/hang net(s) etc. questions?

Hi yall, I am thinking to flip these Wedding Cakes (3x and 1x Blue Cheese) to flower soon.

I will likely move the runt to another room or replace it with a healthier Northern Lighter which is growing faster.

Issue is, my room is not very tall. Only 55 inches. I will plan to add 1 scrog net (maybe 2) when ready.

Questions are:

• Should I wait (about how much longer) to flip to flower? Maybe a couple weeks?
• Do I wait for 70% of canopy to be filled?
• Do you recommend using 1 or 2 scog nets?
• Overall how are they looking? Okay? (Note: this picture is not perfect because the outside sun is shining on the lower left which is why the color is different there).
• I will plan to supplement CO2 for the most impactful period. Is that all of flower or the first few weeks perhaps?
• Is it good to make the SCROG screen height modular and if so, how would I best arrange to hang that then?

Thanks in advance for your advice!!!

Place your scrog now. Just one for the time being.