It's really a combination. This configuration needs to be balanced end to end and side to side. I allowed for pipe-sag with a 2x4 underneath though. I think I will separate and feed each one separately. That's really not a big deal, just a lesson learned I guess.
Unit 4 comes on line tonight (a 20 bato bucket drip system
for my tomatoes). It's all done, I just have to put the plants in. Pictures to follow