Thanks so much, everyone! Iggy's been with me for almost a month now, and so far so good. He's a really awesome little dude - tolerates handling well, seems comfortable in his tub set-up, and is not excessively shy or irritable.

@Zincubus, he actually has a pretty good appetite too. The breeder had him on live mice, and he's readily taken the same for 3 feedings so far (even the most recent one, where I only noticed afterwards that he was looking conspicuously more greyish and is likely going into shed soon). With that said, after he's done with this shed, my plan is to have him make the mouse-->rat fuzzy transition soon, and ideally the live-->frozen/thawed transition not too long after that. This might turn into a battle of wills for a while, as he was not particularly keen on the one time I tried offering a thawed mouse first. I will have to prepare myself to be patient!