Just discovered this snapshot from last year on my cell phone:
I was driving by on a sunny morning after a dewy night and noticed the arched pattern of damp and dry regions along the edge of the roof. (As always, click the image for the full-size version.)
I think that should be telling me something about the roof ribbing (which the rivet patterns suggest continue across between window stiles, as one would expect) and the presence or lack of insulation between them, but I’m not quite sure what.
At some point I’d like to know, as (A) I might want to cut a hole in the roof for an air conditioner and (B) I might want to run wires in the ceiling to augment the marker lights on the outside and the speakers on the inside.