We adapted the original script so that you can specify different diameters for the connectors. We needed this because we had to connect different size tubes.Latest print seemingly water/air tight print still leaks under pressure sadly enough. The material itself seems to porous. To clarity, leaking didn't come from between the tube and the connector, but somewhere in a free part.Ow and we try to use it on a water cooling system, so there is quite some pressure, maybe for other purposes it does work.