Don't know about that one, but I have been having a problem with the way two engines have been running. After Tuesday night, I have come to the conclusion that of my quick fill valves are leaking air. I flew a lot of flights with no problems and all of a sudden, I am sucking air like crazy. I checked all the lines and no pinholes.

I am really starting to wonder if these valves are worth a darn. I have seen a few posts on them and am going to go back and see what they say, just haven't had time yet.