Here's the new addition to the cage, which is what I spent Grandma's birthday money on. I improved the connection between the cages with a T-piece, allowing me to uncover the hole in the smaller cage and put the blue elbow back in place instead. Good thing, because I had to plug a new hole with that Altoids container (small, metal so he can't chew through.) I also added a viewing tower w/ circle run (plus a new toilet paper roll, which started in the front but was dragged to the back because apparently my furniture plans do not suit Sir Squeakypants at all.)