I hope this round of CO2 questions to be my last for a long time. I have a CO2 cylinder, and a regulator. What else do I need? Needle valve? Check valve? Diffuser? Bubble counter? some or all of these? Thanks. -Chrys //Fax:(520)244-8663 "and i try to laugh at whatever life brings cuz when i look down i just miss all the good stuff when i look up i just trip over things" ~ Ani DiFranco