I am planning on building my own incubator out of an old dorm fridge. Using the Sportsmans cabinet and your all's ideas as a guide. I am curious about the humidity in the sportsmans and other cabinet models. If I raise the humidity after moving eggs down to the hatching tray, it will raise it in the whole bator and be too high for the other eggs still turning up above. How does this work? I currently run two foam forced air... one for turning and one for hatching. How do you guys handle this issue in your big cabinets that are turners and hatchers? Any thought or suggestions. Am i misunderstanding the principles behind the Sportsmens models?