No such luck. I got the last growler of RPM before they hung the "Out of Beer" sign, but Brewfest is tomorrow and they're installing their 3 new conicals so nobody was in the brewery, just the server girl. I guess I'm back to my original plan of trying to reverse-engineer it.
Side note - the girl in the shop told me she was optimistic that they'd have Diablo Rojo en Fuego (chili beer) on tap once they get the new system hopping. I fell in love with that stuff, so here's hoping!