2 x 600w HPS Scrog HELP

I have 2 of these "tubs" link ----> HERE

I have 2 x 600w HPS lights. I am trying to do a scrog. I am using the "Mr Green" video as a basis for setup. So I am doing a flood and drain with these tubs.

Now in the video he doesn't so a scrog. He does 4 plants that are each topped 1 week into flowering.

My question/problem is...how do I convert his setup into a scrog. Will I have any problems doing this? Are the 4 plants in each of the tubs (8 total plants) too many plants?

Any feedback would be awesome and greatly appreciated as I build out this room.

p.s. The room is going to be about 5 ft wide x 7 ft length x 7 ft tall.

Thanks!

Your link isn't working.

Build a screen to go over the plants. That's all I did and I'm running flood and drain. So far so good. You can check my journal out if you want https://www.rollitup.org/t/super-lemon-haze.885764/page-2 I've got a couple of pictures of my screen.