Sounds kool. I have always thought about making a large cabinet like an intertainment center into a grow cabinet. I use a makeshift 4ml black plastic grow tent. I have a 6" 440cfm inline fan pulling through my 1000w hps fixture and exhausted out roof. The fan is kinda loud if you were going to put it inside. I have a 4" inline as well, not using it now but its much quieter. I have negative air in my enclosure and with no air coming out it controls smell accept at vent termination which is 20ft in the air. Seems to work very well. Good luck man sounds like a very kool idea please post some pics when you get it done would love to see it when it's finished.:rasta: