Good luck Tim with the fix. Sounds like it is holding air now. Let us know how it shoots with the new plenum.Yesterday it was blowing air out the reg vent too so I replaced the large o-ring inside the reg. Before I disassembled the reg I measured the OAL then after rebuilding I returned it to the same OAL so I hope I did not change the reg’s pressure setting?
After I installed the reg, bottle and plenum, for the umpteenth time I aired it up and voila, it held air! Go figure? ID have no clue what happened previously or what was different today but it’s holding air … so far.
I did not need the 20cc extension I am only using the 35cc necked down plenum.
I was chuckling about your comment about, ‘what was different this time, now that it’s holding air.’ Sorta reminds me of how I feel when my EzAY fill trigger actually ‘works’ and fills air without leaking from Lord knows where?

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