what do you guys use as heat sources for your homemade incubators. I am seriously thinking of building one, especially with all the problems i have had with my hovabator lately. My brother is an electrician so i am not worried about the wiring or anything but wanted to know what works best for all of you that have built your own. If i make one, i would like it to set at least 4dozen eggs..and i would really like for the bator to have the same temp over all the eggs. and what about humidity? do you place the water at the top or the bottom(close to or away from the heat source)? has anyone used plywood construction? I want it to look good too and had planned on staining it and possibly clear coating it all over to help keep humidity in. anyone ever done this? would it be toxic to the eggs do you think? I have looked at some of the incubators on here but still find myself a little lost and with some more questions. I really wanna try this..