Many thanks to the list for the suggestions. What I decided to do is order a one piece manifold from Shokan (thanks Dave H.) Apparently these o-rings are not to be found, and if I did, they and the 2 piece manifold's are crap. It cost ~$151, but I'm tired of the headache...... Happy Holidays everyone. Rich Burke 88 %KCSTQ, gonna have new A/C for Xmas, and its 15 degrees out....