On the way home from the dad's day fly-in @ KTOB Andi and I took Niner-pop-hotel over 1800 hrs. So I dropped the oil, checked the filter, checked compression, and scoped the valves.
Filter was clean, compressions were above 77/80 on all cylinders, and the valves looked pretty good - plugs were clean, too. #4 cylinder clearly got into the Spotted Cow........
O-320/Carb/EI/Mogas/Lots of LOP.