Ahh makes much more sense now. See I started on the cheap side, the simple 5 gallon bucket setup. While that can work well I quickly found that expanding to larger RES's, like yours, has really solved all my problems. No topping off since it's all tied back to the central reservoir, no Ph'ing pains, etc., etc. Using a 6 inch netpot lid/top for the bucket currently, that is too big? At the plants biggest the 5 gallon bucket would hold roughly 3.5 gallons of water with the roots and all, would using the smaller netpot really make the plants root mass smaller in the 5 gallon bucket?
As for moving the whole plant that is easy. They get rotated every day as it is. Where I ran into problems was doing late stage bucket changes. Trying to lift that mass out and into the new bucket while not toppling it was hard. It was over 6 feet not including the bucket so maneuvering it between buckets could be difficult. So I learned the hard way that size control is important to "make the garden work for you" as you say

But on my first try out I nabbed well over 8oz from an Auto ( I know I know.. I was young.. confused..) since the plant was such a monster. It's sister plant was slightly bigger and yielded roughly the same amount so I thought it was "normal" for the plants to get that big in DWC.