I've been working with wood for a long time, so I've decided to stop buying "fish tanks" and build my own enclosures. I've got a normal BP that is about 2.5 feet right now, and he's outgrowing his cage. I only want to build this little guy 1 more cage for the rest of his life, how big should I make it (he's currently 481 grams, but I know he'll get big). Also, as I'm planning on building the cage out of birch plywood, how would I heat the bottom? Would a UTH be able to penetrate 3/4" material? Any other heating suggestions would also be appreciated. As of now, I've drawn up a cage that is 48LX18DX16H. Do you think this would work for the rest of his life? Any thoughts from you more experienced builders would be greatly appreciated.