I know it goes against all reason but did you see how I did the small tent? it's using a version of the autopot they all get the same food on a ebb and flow. one big tray. looks like they are sitting in water all the time. because they are. Perlite in the bottom of the pots(2-3 cm/ 1" ) keeps the roots from getting rot or worse. acts a little like deep culture.
say what you will but it works great if you can keep it clean from critters and from getting too humid.
One reason I think it worked really well with the 2x2 is the pots are packed in close not much evaporation space between the pots. I have had a hell of a time in the 2x4 keeping humidity down because the spacing between the plants is larger. more evaporation. may have to devise a skirt or way to limit that in the future if I go with this layout in the 2x4 again.