OH, and about keeping the humidity up...my corn's hum. right now is at 50-55% all the time. That is with an uncovered screen top, and a water bowl. So I think I will be able to maintain proper humidity for the boa...if I need help, I plan on cutting a piece of plexi-to cover about 1/2-3/4 of the screen top...maybe securing it on the inside of the screen top somehow...