I started working on the wing within a few months after buying the car in 2003. I spent a few weeks reading all the journal articles I could find on the connection between rear shape and drag. From those, I concluded that I should have a "shelf" about equal in path length to the distance down from the top. I got a photo of the assembly into this email. I will have to come back with photos of parts after I figure out how to do it.
Ernie
