Hi! First I would like to say that's an awesome setup! Extremely creative! I am currently adding an acrylic top to my 18x18x24 exo terra because the screen rusts to fast with the high humidity and constant misting. I also really need to keep the humidity high for my brazilian rainbow boa. Can you tell me what size drill bit you used to drill the holes for the mistking. I am dying to know! Thanks so much!