Excuse me for being stupid here, but can someone tell me what type of barbed tail piece goes to the bee line side of the shank. I have seen the websites with and with out the tail piece, but can't find anywhere that describes it. Does the tailpiecs screw into the end of the shank, or is there some sort of pressure fit, like the screw type connectors. I am strongly thinking about changing over to true beer shanks from the soda taps that I have in my system, but everything will have to be ordered on line, so I would like to get a full set in the first try.