So in my tear down and rebuild (info coming soon), one of the things I wanted to do was to put connection on the back of the unit for my water inlet/outlet and my air inlet. I had all kinds of problems getting the tubing to seal properly around the brass fittings or they would try to kink too much. I ended up cutting the tubing by the laser and splicing in a 1/4″ fuel line. With the fuel line I was able to make bends easier, it sealed better and is a lot less brittle.
Pictures coming soon.