i have been looking at various hydroponic systems, i have seen 1 called the 'wilma system' its basically 4 pots layed out in a square on a tray with a resorvoir built in underneath, it sounds pretty sweet, drip irrigation so all i do is nutes in, right ph right temp/humid, good air flow and my 600w HPS. it would be great if some guys could check out this system and let me know if all is good, and also 4 plants under a 600w HPS roughly how much yield?? all help appreciated