I know that this response is delayed but the archieves are great. I recently purchased a new compressor also. The compressor came with the same set of metal sealing style rings. Upon close inspection, these rings when seated in the respective seats on the rear of the compressor did not look like they would seat properly to the manifold hose (one side was higher than the other). The manifold hose was removed, and when I tried to match the manifold hose to the sealing rings / compressor on the bench, found that one side would not seat properly to create a good seal . This sounds like the same kind of problem. Anyway, was just wondering what your results were so that maybe I can avoid re-inventing the wheel.