A little bit of detail work follows. If you look at the second pic in post #112, you can see a hole in the center of the radiator outlet duct. Hasegawa would like us to mount a single radiator flap actuator in this hole but in actual fact, there are TWO rods that control the flap as seen here:
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So, I filled the hole, drilled two more, and inserted a couple of rods that ended up being glued to the underside of the cockpit tub. I also added the horizontal stiffener.
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Rainy days ahead so hopefully should have more to show soon.