I don't care if it gets me 30% better MPG- I'm not building crap over the rear window. Too much effort, not enough visibility (if it were a hatch it would be different).
Attached is good enough there- I'll do what I can with curves on the rear and see how it goes. Hopefully get something done today. Yesterday I went go-karting on a sweet outdoor track but it really took a toll on my upper arm muscles