What brand incubator are you using? Or do you want a small incubator with an auto-turner? Why only a dozen eggs? Your bator will hold a steadier temp with more eggs. Say you are useing a bator with a 42 egg capacity, it is best to put about 36 eggs in it. This doesn't overload it, yet lets it work the way it is designed to. If those that complain about certain bators were asked how many eggs they are trying to incubate in their bator, you would find most under or over load them.