just thought i would share a pic of the incubator my hubby made for me. its made from an old computer case and several computer pieces. put a sheet of plexi glass over one side for viewing. have shelves for hatching (that slide in to place and latch) they replace the egg cartons. there is a throttle cable hooked to the lower carton used to turn the cartons (all cartons are hooked together but if need be can be removed separately) it can hold up to 72 eggs, although i don't think i will ever hatch that many at one time. what you think?