I've only been in the business for a year or two and I have witnessed 3 units per 1k in a SOIL SOG, personally. If that is achievable then Heath Robinson's grows are more then doable.
beenthere, this setup is exacly what I am trying to wrap my head around and am working on my next room. I just joined to ask you a few questions but I can't privately message you yet. Can you message me?