Spent several days over the last week or so, continuing on with the engine baffles, to the point that I'm now getting close. Baffle panels are all trimmed down to their final size and reinstalled (hopefully for the final time), spark plug lead penetrations are fitted, tie rods that run under the cylinder heads are made and installed, and I've started on the rubber strips.
I reckon I have one more day and I can call this very time-consuming part of the build done.
Using the paperclip method to determine gap to the top cowling