New BP isn't feeding?

[bubs]

Everything sounds ok to me except the 1 Hide situation and 4/5° too warm. My snakes wouldn't use the Hot hide if it went over 90°. Even now they use the Cool hide (80°) 99% of the time... That is a clean ivory. Gorgeous. As far as the tank size we all have a preference. I myself never used Tubs or tiny tanks. I have used a 10gal for quarantine but I've even moved that up to a 20L, 33L & 40 gallon breeder's. So for me id say there is absolutely nothing wrong with your enclosure size. You mentioned all the Decor and that helps them feel secure so your good. Get a Cool hide (I suggest 2 simple RBI Mediums) as they're easy to clean, light weight and very secure. That size would last until around 700 grams if I remember correctly. But at a few dollars each you cant beat it.
Also incase I missed it, cover 3 sides with cardboard or Dark paper. Other than that just wait and offer only once a week.. Like you mentioned a shed could be coming. Mine take 3 weeks of during shed time and eat like a Hog after.

Thanks for the help, I've left him in the viv for now but turned down the UTH. I picked up 2 identical small plastic potting bases for hides until I can find more permanent ones. They're slightly buried and I added some more moss so they're hidden. He still seems to be completely uninterested in them and he's cruising around the tank now as I write this. Both outsides are covered in black paper, and the back has the tank backdrop.

I will give it a couple of days before I try feeding, and if he still won't eat, I have purchased all the things needed to change him over to a tub. I don't want to risk ruining my UTH on the viv so I can get the probe out until I absolutely need to.