I'm definitely liking the "dig" theory. Unless I'm mistaken, all accounts have Levon bailing after the DC show on 11-28, and all accounts have Ginsberg attending at least one, if not both, of the Berkeley shows (12-3 and 12-4). So it appears the "new drummer" played in San Diego (12-10). So either Levon flew out to the West Coast for 2 shows before quitting, or there was a drummer who only lasted the two Berkeley shows. Or so it appears.