Hi! After the success of getting my broody australorp hen some fertile eggs to hatch in October (thank you BYCers for your help with that), my son would like to try to build a homemade incubator (we have already found homes for any eggs that hatch). Can anyone point me in the direction of some good reliable instructions on line? It seems there are a lot out there, are there any that work better than others? Any pointers? Thanks so much!