I really admire the amount of time and effort that you've spent researching and learning about these animals. That speaks volumes to the care that your snake is going get. Everything looks great and congrats on the new family member!

I also strongly suggest looking into a PVC or front opening enclosure when he gets bigger. Your setup now is great, but you'd be surprised at how quickly you get tired of lifting the screen off the tank. I personally have my hatching bp in a 10gal tank and I hate it lol. All my other snakes are in front opening enclosures and I'm not sure how I lived without them. Smart plugs were also a gamechanger for me. I use LED light strips or fixtures in my enclosures and I have them all hooked up to a smart plug or 2. Makes it nice and easy to set day/night cycles.