OK - how are you measuring your temps? With a digital device or the stick on analog dials? What exactly are your temps on the warm and cool sides? Are his hides snug hides that he can feel touching him on all sides?

STOP handling him until after he's eaten for you. He needs at least a week, maybe even two to acclimate to his new home - with no handling.

Offer food in his enclosure, not in a separate feeding enclosure.

Offer live, not f/t, since he's never had f/t yet. You can do the switch later.

Constant roaming, even if not frantic, but not ever settling into a hide for most of the daylight hours is a stressed out animal.

You can try filling his enclosure with loosely crumpled newspaper filled to the brim to help settle him - so that he feels something touching him on all sides.

After a week, drop in a live hopper mouse and walk away. Check back in 30 mins and it should be gone.

Start weaning him off the paper, one or two pieces every few days.

Newspaper isn't pretty, I know - but your goal here is to acclimate your animal and getting him feeding with you. Pretty AND handling can come later.