Welcome back

I suggest you remove the foil from the bottom, that is not normal or good for them, they expect no reflected light from below the leaf.

You want to grow WW in a 4" box...I assume you mean 4' tall box? Not going to have room for light with one of them. I have trouble keeping it under 5 feet. I hope you get a very indica phenotype.

Don't let water accumulate in the drip trays, dump it out as soon as you can to keep from getting a soggy bottom and dry top.