After many, many, successful, mindless set ups with these valves, I finally had one that leaks air like a strainer.

I had both little alan screws (yes, there are two very little ones, one on top and one on the side) leak.

I also had two brass nipples leak around the bottom, where they mate with the aluminum case.

I was unable to fix them as the CA I was using was hardening too soon (ie before I could thread the alan screws and brass nipples back in)

Oh well, I thought these were God sends, but they also have a failure rate. [&o]

Lesson learned: Hook up the valve and test it before its placed in a spot that is unaccessible. [:@]

Raf