Well first off i took a thermostat off of a space heater.( i tried the hotwater heater thermo and the fish tank heater thermo but found that this one regulated the best.
Humidity is regulated via the manual vents on the back of the cabinet. In one of the pictures you'll see a tray in front of the fan and heater can. I found that surface area is an easy factor to adjust. the tray in the pic is 12 x 16 humidity was 82, with the bottom of a chick waterer was 58, and with a big yogart container 51%. cool huh?
Well as for searching, i've been looking at every name brand system out there they want from 400 to 1100 dollars and all of them are made of painted plywood. Most don't have egg turners. A friend of mine had a dickey's brand system and brought it over for me to study. He paid 400 10 years ago for it. I took one look at it and desided that i could build a system 5 times better looking than that one. so i got started. I researched all of the componants and found the best way i could to manage the three major things. (temperature,humidity, and ventalation)
There you have it.