Just finished this today. At this point It's still a roof and sides extension but I'm adding bigger panels soon. I can't wait to try it out. I have to find some rubber moulding for the leading edge on the sides where it touches the paint.
The pieces are all totally detachable and no holes were drilled into the body. I used existing bolt holes and bent stainless brackets to attach everything to the back door. I tried to get around 10 degrees slope and will gently curve the panels to get optimum taper. I plan to make the panel over the rear window plexiglas so I will be able to see and do tuft testing easily.
Cutting out the side panels:
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