Wow, that's really cool! I had a similar setup for my leopard geckos awhile ago, only my litter dam was made of cardboard and duct tape... so it was kind of...wel ,not too great. Also, I got a screen lid that was hinged in the middle, so one side of it was attached to the tank, and the other side swung open sideways. Yours is definately more well done than mine was, lol