I just finished my first batch of film with my Jobo CPA and Expert drum... all I can say is WOW! I took a big gamble on using PMK Pyro as my developer since that was all I had, but I used 2 liters just to be sure I could get around the potential oxidation of developer problem. The gamble paid off... the negs are PERFECT! not a scratch, not a bubble, nothing but perfect film! I'll never go back to trays again.