Thank you. I've definitely been being paranoid and just need to accept he'll need a while to settle in. This morning I caught him creeping around and sunning himself, so I gave him a good soak with the hose and he loved it. Gave me a big ol' stretch and posed handsomely.
It's the only species I'm actually familiar with. I see them in the wild occasionally (usually rescuing them from the road, we all know they are not high on the list of intelligent animals) and every time it does amaze me how for a little green lizard they all look so different. My first one was huge, the vet said he was the largest one they had ever had in. This guy is tiny, especially for the size of his horns.