Everything looks good except like Albert said, ditch the wire cage CHE housing and get a regular dome fixture with a ceramic fixture. You are losing a lot of heat out that hole as well as humidity I would imagine. Using Eco Earth, you should not have a humidity issue if you change that fixture. I use aspen in a 30 gallon(36x18x12) with pretty much the same top as you got except my top is 1 piece cardboard with a hole cut out on 1 side about an inch bigger than the dome. With that set up, I get 50-60% humidity, 86F ambient hot side, 81F ambient cool side and the CHE warms the corner of the warm side hide box to give her a toasty hide for after meals.