Thank you for the advice. It seemed a little too complicated for me so I called the only espresso machine/repair shop nearby (still 45 mins. away) and was told they don't service the Starbucks Barista because it is a very old machine. Oh, well!

Does the under side of the Brew Head have a rubber gasket? A small portion of that gasket (?) fell out. Can it be replaced easily? It makes the Rapporto Filter not sit evenly and coffee leaks out the sides. Also, the underside of the Brew Head has a metal plate with a small screw in the center of it ... and that has been falling out as well. Any suggestions?