hi there im gonna be makking 1 of these tables in 4 weeks time.i found a cheap tray 2 use on ebay. Garland Metre Square Tray 100x100x12cm Hydroponics on eBay, also Hydroponics, Plants Seeds Bulbs, Garden Plants, Home Garden (end time 30-Jun-08 12:30:11 BST) i do think ill have to make a grid at bottom 2 get the rw of the bottom.probally use some sterdy wire mesh with 25m plastic pipes 2 suport it.so theres load of room 4 the roots and flow of water.the table im just gonna build outa 2x2 .so i can make the res easy to get 2.i also want the res 2 be round so i can run a small pump 2 keep nutrients moving .hope this gives you some ideas
spliff