how big/thick?

[BirdBoy88]

for thos who put a piece of wood or thick piece of styrofoam under your egg carton when you turn your eggs in the bator.... how thick does the piece of whateva your useing to turn your eggs has to be ? so that the other side of the eggs can get warmth to

 

[Poison Ivy]

I just use a piece of 2x4 in mine.