In the next month or so I am going to buy an incubator. I have French Black Copper Marans. The shell and membrane are very thick and the color is very dark. Someone told me that I may have trouble hatching this kind due to humidity problems with them. Anyone ever hatch this kind and have good luck? And will I need to adjust the humidity level different than what the manual would tell me to set it at? Also suggestions for an incubator. I want one that would hold at least 30 or so and able to use it inside so the grandchildren could watch and learn when they are here. Thoughts please. Thanks.