https://www.backyardchickens.com/t/976303/building-a-incubator-from-a-wine-cooler
That is the thread from my husband on our wine cooler incubator. It's probably a little more high tech than most home builds. Works beautifully until I overload the turner with jumbo eggs and kill the motor haha! We have been dry incubating, the incubator runs around 30% humidity +/-. I normally pull the eggs and put into a separate hatcher but I've read I probably should not do that with Serama eggs (and I'm still hopeful about getting some of my eggs to hatch). I have accidently forgot to pull eggs before and they hatched in the incubator just fine, in fact the ones I pulled late did terrible, but this could have been that in my rush the bator humidity got too high. My normal hatching humidity is 60-70% with us going a little higher if we are hatching button quail. I've read that Seramas may benefit from slightly less humidity.
I would love to hear the thoughts from those of you with experience on hatching serama eggs, especially shipped ones.
*My bator and hatcher is so stable eggs never go over 21 days and can be almost perfectly timed to hatch on day 21 for normal chickens, 16 days on buttons, 17 coturnix etc.