I was checking my port check setting and noticed that it will leak very slight, starting about 5# before it actually cracks/opens. This is an adjustable check with the threaded adjuster inside, not the shim type. I took it apart to make sure the poppet and seat looked OK and don't see an issue. Any ideas? Should I replace it with the shim type? I have a shim type at the idle check and it doesn't do that, just opens cleanly without leakage before it opens.