i have designed and have been using my own 5 tray incubators. they use the egg turners that are used in the little giant and the hova bator incubators. I did this to reduce the amount of styrofoam incubators cluttering up my house. I have been using mine for 2 years now. the wafer thermostat models are $250.00 and the electronic thermostat models are $300.00
