Thanks again. Plays and sounds great. I didn't even have to tweak the factory set-up. Fwiw, I've found a bit less difference in sound between various P-90s (I own or have owned guitars with these P-90s: Gibson stock alnico, Epiphone stock alnico [2--Casino and WildKat], Agile stock ceramics, Seymour Duncan alnico, Rio Grande [neck pup in Casino] alnico, and GFS alnico), whether expensive or budget, as compared to the pretty vast differences between various humbuckers.
So far at least, in my experience, a P-90 sounds like a P-90.