The 12" are the approximate height of the pots i wanted to use (2gallon). I'm growing an indica in a one gallon pots (totally different grow box) so i am working on my new dimension set up. As for the mother chamber, i am keeping it flexible, height wise. After i get this bad boy tuned up, i'm going to be attempting all the cultivation tech--topping, supercropping, scrog, sog, etc...As far as the original height i planned, the moms would actually have two feet of grow space. Please be patient for my new plans. I do most of my posting at work, and pictures come only if my gf isn't doing her studies. i've gone through the things you've mentioned. But its still good that you post stuff like that in case someone misses something. kudos
stay irie,
kailiwela44