Update
Still here JG, just been busting my ass for the last week trying to get my room ready and put together this fucking beast of a system..............basically trying to emulate the box from the thread linked earlier (post #355, "Mr. Mister") - his craft skills are 100x better than mine, but I'm doing my best.
Also can't for the life of me source a box to hold this timer in.........it's 4.5" deep, and it seems they don't make boxes that big - looked all over the Grainger website for the one that Cavadge used, can't find it..............if anyone can find that box, I'd be much obliged.
Pressure switch/pump combo is wired, timer is wired, just need to run a wire to a junction box which will feed all four solenoids.
Bottom "row" (15 misters) is done; will finish the top row as soon as UPS gets here with my John Guest fittings (broke one of them while installing, I'm that much of a beast :) ).
As you can see, put a screen over each mister to prevent roots from covering it; that's a "sun screen" (not an insect screen), so I'd highly doubt any roots can get through that sucker (insect screen they could go right through).
Got a Black and Decker air compressor for $60 with a digital gauge that can go up to 120PSI.
Also am building my box (almost, save for tubing and some electrical holes) completely sealed (not sealed, but no designed openings for heat to escape) - don't think the pump will run for that long anyways, and I HIGHLY doubt heat would be a problem - there's gaps anyway from my shoddy craftsmanship :)
Was pretty surprised at how quiet the pump was when I tested to see if my wiring job on the pressure switch was right (it was) - granted, it was sitting on my carpet with no water, but it was MUCH quieter than I'd expected.
Ummmmmm, I guess that's about it for now...........realistically, early next week I hope to have plants in the system - will have it setup by tomorrow (Sunday at the latest) and running for a couple of days before I put anything living in there.
Any comments/questions, please do ask/tell - lemme know if you see anything that's gonna cause instant death - thanks :)