Lol I tried a 2L sog once. wasnt too happy with yield, was in promix though. Cool link and cool concept. Sounds like it maybe up Peyton's alley.
I'm working on making Hempy smartpots. After I get back from my trip gonna give it a try. Seems like it would work, best of both worlds air pruning roots to create large rootball and Hempy, constant supply of nutes bigger yields.
Also I'm doing an smartpot sog next round.