[quote=“shewster”]Serioulsy though. I’m thinking the huge head in the first glass is being caused by the “air” pocket in the line.
You are correct in a sense. You will continue to have “air” or a gap created each and every time and will continue to see excess foam in-between pours until you balance your system. There is no leak and the beer is most likely properly carbed. Many times it is because you are running too short of a line. In the past and to this day LHBS and commercially sold kegarators tout the fact that <5ft of line is fine and dandy which when running the numbers for simple short run draft systems it usually turns out to be around 6-10ft of line being optimal.
I run around 10ft on all kegs and have perfect pours every time with no “air” or gaps in the fluid line. If you don’t want to run the numbers just start with 10ft and if the pour is very slow you can chop off a half foot or so until you find the length needed for your setup.