OK. It seems to be up and working.
My take is this:
1. The middle row and the bottom row tufts all indicate attached flow, but slightly turbulent.
2. The top row tufts are more turbulent and I think that this is caused by the the airstream "tripping" slightly on the rather large open seam between the hatch and the roof.
3. Honda pushed the very limit with the hatch angle. They probably figured and optimum compromise between aerodynamics, length, and rear visibility.
Just as a guess, one might raise the hatch lid a couple of inches and achieve better aero. In a couple of weeks I'll probably give that a try. All comments very welcome
