I've recently had two Stihl 044 saws fail a p/v test for the same reason; leakage between the bearing spacer and the crankshaft (PTO side). I've had a handful of these saws in the past that held tight with no issues. Since the bearing spacer isn't a press fit onto the crankshaft it seems perfectly reasonable that it could/would be a leak point, but I'm wondering why all of a sudden these two are leaking when others held. Is that just indicative of wear from use? If so, is the wear typically on the crankshaft or the spacer, or both?