I've got quite a few saws and have noticed that two saws might blow the same compression numbers on the gauge, but one won't leak down much at all, and just stops the starter rope dead, while the other just blows through like the compression is low. But on the gauge they will read the same. I'm guessing one is leaking down more than the other, even though they both blow the same at high speed. We re-hash the same stuff over and over on this site, but I don't recall ever hearing anyone doing any cylinder leak down check. Any comments on this? Tony P.S. I'm not talking about a crankcase leak check.....I'm talking about a leak down check above the piston while its approaching TDC.