just finished reading both your journals....WOW! very insperational man....Def subscribed to see ther finished product!! and def ++ rep on that exhaust set-up simple, yet brilliant!!!! love that 2 1000hps in 1 tent set-up...thinking about doing that in my homebox XL, 56'x56"x78.75" using 2 radiant 6 reflectors with hortilux bulbs via 3 icebox heat exchagers to water cool the lights, (1 for ea reflector with insulated ducting and a y connector via insulated ducting to exit side of tent and the other will be mounted outside the exiting side of the tent to act as an ac for room and the room..something like those lights dude mentioned his friend had in vegas, 4 damp rids, a co2 boost bucket system, 440 cfm exhaust fan with a can 66 filter attached, (or may try your exhaust system set-up!!) .....GROW, GROW, GROW!!!!!!