Too funny (no disrespect meant elamintor) but I have two of them and they are pretty mature (in my systems) approx 2+ years for one, 1.5 for the other. Different tanks but they are in with Chromi's, Damsel's, a gramma, midas blenny, Yellow tang, and they are model citizens.
Am am glad I read this tho b/c prior to purchase (of the first one) I had heard rumors but with the aforementioned experience I was about a month + away from adding them to a newly established DT with a bunch more newer fish so now I'm second guessing that decision.
Good luck getting him out. If you get it out successfully (and it's not spoken for) I'll give you $20 for it as I have one more system that could use one (my first tank). Lemme know.
Tom
(in Wakefield)