I was milling a giant cedar elm log with my 045 Super, which I did the ignition fix on six months ago and had been running good to date, when it abruptly died near the end of a cut. Wouldn't start again and when I went to refill the bar oil reservoir, oil poured out all over the place. I switched saws and looked at it again when I got home. The oil sight glass was gone on the other side of the reservoir. Still wasn't starting after I switched that out and refilled the bar oil. Checked it for spark, then compression, and found it only had about 50 psi compression. Before retiring it some years back til I got the ignition fixed, I replaced the piston and rings, so they don't have many hours on them. Was curious about whether it was just a fluke I lost the oil sight glass and compression at the same time, if the crankcase gasket went and the oil chamber got pressurized enough to blow the sight glass out, but taking apart the cylinder, the piston is scored beyond belief and the cylinder isn't much good either. Probably did much of that damage overheating the saw when it ran erratically before the ignition fix.