@Jalisco Kid I was just gonna use the overflow as a clean out. Thought about putting one in. It would have been really simple. A t instead of a bow. If I had been doing a standard layout this woudl have been much easier. I still can access every plant without steppign over pipe though, and I plan on building a big platform in the middle.
They are in 28 gallons so I don't see how a 30 gallon will make much difference, and there is no fuckin way I could/would want to get these out by myself. I have seen mega plants in 5 gallon containers so as long as I water enough they will be fine. Plus there is a space between the two trash cans. The top one is full of holes and drains to the bottom, which then drains from the bottom, so they will get air pruned from the bottom and I won't get O2 starvation at the bottom of the pot from root mass buildup (all in theory).
Check your email I sent you a pic of the vac breaker I got. It's for commercial irrigation.