I was kind of hoping I wouldn't have to scrape off the old glue with a razor blade, but if I don't have to worry about damaging the stator by scratching too deep into it or something like that (since I know they're coated with an insulation layer), it might be worth a shot to do it right.
If most kinds of polyurethane glue work out just fine, then I should be able to get by with a bottle of Gorilla Glue (available in most brick-and-mortar stores here in the US).
As for AC input, I didn't think of an amplified audio signal itself being a source of AC power, but it does make sense when I think about it.
In other Stax-related news, I just spotted an
SR-Lambda Signature with SRD-7/Pro on eBay. I'd try my luck at bidding on it myself and giving the Lambda Sig a spin, but my bank account just won't allow for it, especially with these Steam sales going on! (Also, I really need to save my money for a proper Stax amp with both bias outputs, especially if I get that SR-303 functioning properly.)