So today I rounded up an ecomodders best friends: Cardboard, duct tape, and a utility knife, and went out into the driveway to make a Kammback.
Despite my best efforts, I have become *that* guy in my neighborhood. In the midst of duct-taping a bunch of cardboard to my car (again) and then taking lots of pictures of it, some of my neighbors peeked out of their house and started watching me.
Here's the whole gory mess
I plugged it in photoshop and measured it out. It's currently sloping down at 13.5 degrees, the rear roofline is only about 5.5 degrees.
Also, it angles in from the sides at exactly 13 degrees.
Here it is in comparison to the old spoiler.
And just as a matter of an update, heres a few shots of the car in it's current configuration (sans Kammback)