I just built this rack, eventually hold two tubs, these are 35QT tubs. The heating is nothing more than UTH on themostat right now, I might move over to the flexwatt setup eventually. My questions is about the lip in the tub, which I've taken a picture of, I'm not sure if my ball python can or cannot escape out. I know once he grows a bit, it won't be an issue, but I'm curious if he can even attempt to fit through that area. Other than that, the tub is pretty secure, it's a nice snug fit. Open to opinions of course, thanks!