Fun read, Steve! I like the way you've aligned pictures with your text. Not quite sure if it will work out that way for my own TR on rim to rim, but it's on my mind. (I have quite a few non-trail pictures.)

The first picture of the tunnel is AMAZINGLY just like the way the Supai Tunnel (1.7 miles down the North Kaibab Trail) looks. You'll see when I post it . . .