Do you think it would work to use the stuff that they make counter tops out of? Or would the particle board that they probably use in the middle cause a problem?
Is there any chance that I could get a copy of the plans? They look great! The only modification I will have to make is a way to keep the eggs from freezing once they go in... maybe some roof/gutter heating cable? I work nights so can't be constantly checking the eggs throughout the day...