I made this little baby and it works great and it holds the temp rock solid. It will hold 27 eggs in the auto turner and airflow is drawn from the heating element in the top down thru hidden compartment across thermostat and pumped in thru the bottom.
Also has a fan inside for even circulation and a tube for adding water. In a conditioned space the temp is un-movable steady.
Also has a fan inside for even circulation and a tube for adding water. In a conditioned space the temp is un-movable steady.

