I would be really interested in some incubator designs beyond the very basic DIY idea of a foam box and an aquarium heater in water (which is what I am currently using). I have a few basic descriptions and photos of different incubators, but I am after design details, including where to source the thermostat controller please. Also things like ventilation. The one in the care guide has fan. Does this actually vent the incubator, or circulate the air (if just for circulation then I assume there must be other vents)? Another design that I have a photo of, just has vents at the bottom, but may have more at the top that are not clearly visible as such. A fan for air circulation is mentioned as an extra. My current set up just has vents at the top and so I am bit concerned about dead air. Is it enough to open it up more once a day or should I just create more vent holes lower down? If I can source the materials, then I could possible get it put together by my brother-in-law, to ensure it is electrically safe.