Two new images, with the roof just above the windshield a lot smoother, and two hard chines on the hatch; which I like because along with the "spine" on the hatch, they tie into the three hard chines on the hood and front fenders.
I think what is happening with the front tufts, is that since I am only using 3 blowers in the second video, the air flow is not like it would be with a car on the road or a model in a wind tunnel. It is flowing sideways because there is no moving air to the sides.
I am really debating whether or not I elongate the hood. like the 1/4 scale model. The foam in the front section was supposed to be 1/2" thick, but was in fact over 9/16", so it "grew". I like the looks of this, but I thin kthe air flow of the shorter hood (in the SketchUp model) will be better -- because it will accelerate the air more quickly out and around the car, it then will close down more quickly, and this will help the air stay attached, and lower the drag, all else being equal I think?