Well he's just getting done with shedding... The shop employee told me he looked like he was about to go into shed, and he was right.

Shed looks good, the boa went up into the tree so I can only see parts of his body, but the old skin is one long ribbon that stretches from the topmost leaves all the way to the bottom. I don't want to disturb him right now but will try to get a better look tomorrow, to check his eyes and the rest of his body. At first, I had only noticed that he had finally decided to climb the tree, but then I saw the shed skin.

A clean shed is always good I guess once I see him clear of the old skin, I'll take that out of the tank.