Sorry about the terrible lighting - The giant probe is a stand in (my regular thermometer is monitoring the tank my snake is currently in).
I know this tub is taller than what most people typically use, but I picked it because it's almost identical in size to the 15gal tank i have him in now and I want to make the transition as stress-free as possible by keeping everything close (which may be a totally pointless exorcize, but it was my first instinct to try and help) - and I don't plan on getting another snake or starting a rack system so I'm not worried about stacking or taking up too much space - The paper towels are the remains of a humidity test (spritz'd them down with water and used my hygrometer, I was satisfied with those results so I put the hygrometer back in the active cage). The cardboard sheet is a double layer to insulate the bottom of the cage from the cold counter top.
The heat mat I'm using is a Zilla "small" for 10-20 gallons - since the tub is nearly identical to the 15 gallon glass tank, I figured that would be the closest bet. It's created an excellent hot spot...but yeah, all of the rest is in my first post. Move an inch off the heat mat and suddenly the temperature has crashed into the 70s.