Thanks for posting the tuft testing videos.
I was interested in the flow behind the rear wheels. Aero junkies have been wondering for years why Toyota didn't put on OEM rear skirts, as Honda did on the 1st generation Insight.
With your skirts, you clearly had attached (though somewhat turbulent) flow aft of the skirt, on the side of the bumper cover. It would have been interesting to compare to what's goes on back there without a skirt.