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Fixed the issue...
The last 2 cylinders I checked with the leakdown tester had the lowest readings. Went back, rechecked. Turns out the rubber o-ring on the leakdown tester was leaking! New o ring, pressure went up 5 psi on last 2 cylinders...
Odd, but makes sense. First cylinder had highest reading, then tapered down with each successive cylinder...
I think the o ring got a bit chewed up...
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