So hello my new best friends. I have been fighting with a keg that just won't pour a decent beer, and am at my wits end. I'm pouring and ESB, from a sixtel sanke keg, with a picnic tap. I have tried 4 foot, 12 foot, and now 6 foot 3/16 line, at PSI's ranging from 2-18 psi, with the only...