I think we all sort of freak out at first. I would recommend getting a more permanent solution for the humidity if you can. It saves a lot of time. I have the tropic air humidifier and air exchanger. Others use reptifoggers. I will still add slightly damp paper towels which I change 1-2 times per day when I notice Atticus heading toward a shed. Check out the sticky posts for lots of good info. I didn't notice if you mentioned having your UTH's temp on a regulator, but that's really important.
It seems like you're being very conscientious about your snake's care, and I'm sure you'll feel more settled once you get used to its habits. They are finicky but also much easier and hardier than we give them credit for sometimes
I'm no expert, but I don't see anything wrong with his scales.