Pop pop gurgle furgle pop furgle pop pop.
Oops.
But seriously now.
In trying to dry out the cyls, I removed the plugs (which were coated in a gas oil mixture) and turned the engine over my hand with a socket on the crank bolt. Just for fun, I wanted to see how different it would feel turning it the same way with the plugs back in. In went the plugs, I I could tell no real difference.

The engine had been cold for a day, but I should have heard some air going through the valves, or the PCV system shouldn't I?
Does Julian still have the leakdown tester?