I have 3/16th ID serving line that is currently only 5ft and I can only serve at 5psi with no foam. So...would I need 12ft of line if I want to serve at 12psi? I just want to set my regulator and leave it at 12 for carbing and serving so I am trying to accomodate by changing the line length. Is there any other tap that I could use instead of the cobra so I would only need the normal 6ft of line?