My little giant has notoroiusly not kept uniform temp. Soooo..... I am doing an experiment. I filled some zipper bags 1/3 full of water with the air let out and lined to entire bottom of the bator with them. Then I covered them with a clean kitchen towel then covered the entire thing with an old jacket. So far it is holding it's temps great and when I candled I had almost 100% development when before it would only be maybe 60-75%! I guess in 15 days I will know how it worked for sure!