I'm glad you liked it. I think my favorite part might be the train analogy, you might not have gotten there quite yet, I think it's near the end.

I've thought a little about a pressure-dropping experiment. I need to choose a good stretch of road, I think I want like half a mile of moderate downhill. Fix a posture (hands in the hoods, lock the elbows) and coast down. Not sure if I should try to start with the same number of pedal strokes each time, or roll across a start line at a certain speed. Have my pump (with gauge) strapped to my rack, or hidden in the bushes at the start, repeat at increments of 5psi, from 60 down to 10.