Well, it didn't stick
cleanly to the glass. It fluttered around a little, especially near the left and right edges of the glass. But yes, the angles will do just fine.
Jim, would I be correct to say Honda used a more aggressive template than Aerohead's? I see you've properly aligned the template with the ground and the apex of the roof. But you should be able to get away with sliding it forward and upward until the 14° part of the template lines up with the 14° part of the hatch glass.
I made a CAD model in Pro/E by projecting the Insight's top, side, and rear views. As expected, the result is roughly the shape of the Insight, but lacking detail in a few areas. It should be fine for looking at flow over the top of the car, but less so in the vicinity of the tires and beneath the car.
Adding a boattail to the model is as easy as drawing it in the top and side views, then radiusing the edges.