Pretty sure I'm going to get one of these. Any thoughts on these? I'd like to leave it open in a tegu-proof room where my guy can roam in and out. My couple of concerns at the moment are that it looks like the lip of the enclosure is pretty shallow. Will that be a problem for allowing enough substrate for my guy to burrow? Also would I need to improvise a ramp for him to be able to get in and out or is the opened window sufficient? What is the inside like? Hanging light sockets? Any other thoughts on these?