Tandy, I'm liking your bator build. But is the temp range a bit large? I think a 1C range would be enough. Just my two cents though. Filling the whole base with water sounds like it will raise the humidity a bit too much, but then again, I'm not really familiar with your climate. Personally, I've decided I prefer hatching with a broody, our hatching is so small scale that it's a lot less effort. Building a bator would be interesting though.