Nice post and explanation. Very nice image of the rapidly moving caterpillar.
I was curious about how to interpret the test results. The Quality of focus test shows pretty widely ranging results by focus point. Is this typical? And how to you know which focus points are 1, 3, and 5 (with the good results) and 10 (with the poor results).
The chart with different aperture settings seems to confirm the conventional wisdom that f/8-f/9 is the sharpest, but other apertures are usable if DOF is required. Where is the point that you would be reluctant to stop down further?