[700rpm]

I wiped down the cylinders and here is what I found: minor vertical scratches on #3 (bare felt with a fingernail); some brown staining and what look like random scratches on #4, visible perhaps in the photos; a very slight carbon ridge on the top of #3, again just barely enough to catch with a fingernail. The worst of the valve seats is #5, though maybe even that is salvageable (I could try seating a valve there and seeing what happens). Overall the cylinders are not as bad as I first thought, but what are you all seeing now?

I plan to replace all valves with new, at least, but I don't know what else from there.