Well after horrible hatch results running a Farm Innovators Pro Series 4250 I built my own and we are now on day #1. Heat and humidity are holding ROCK SOLID! I see a fantastic hatch rate around the corner!
12 Silkies,
12 Bantams,
12 Easter Eggers
12 Barnyard Open Mix
Room for 4 egg turners or hatch baskets
3 SLC Heating / Cooling Controllers (Top Light, Bottom Light, 12 Volt Heater). Also have an SLC humidity controller that turns an ultrasonic humidifier on and off.
Calibrated within .1 degree Celsius using my tube vet thermometer