Thanks for the kudos. Guinness is the only beer you can dispense with the 25% CO2/75%N gas. All others must be dispensed with either 100% CO2 or a blend of 60% CO2/40% N. Based on your liquid temp., this will determine CO2 PSIG. Guinness should be between 28 -35 PSIG.
Scott Zuhse, Instructor
Micro Matic Dispense Institute