In my new home I have a bar and cannot fit my kegerator underneath. I'm determined to use a long draw system with a homemade water chiller to keep the lines chilled much like a previous DIY thread that brought me to this forum. I've read many posts about line sizing at the this point but I'm not confident in my understanding of the calculations as of yet. I am running two 23 foot lines from the keezer to the draft tower with a rise of 3 feet from the center of keg to the shank. I have typically run my beer at 15-18 psi (American Lager). I am intending to use the 3/16" 7 foot lines currently in the tower as choker tubes. Given this assumption, what would be the appropriate line sizing for the length?