Photos:
Here's showing what I meant, having the undertray curved and the air dam flat:
(Looking at the right front corner from underneath the driver's door)
Corner view:
Front view:
The canards were there to reduce the front-end lift that the undertray seemed to have been causing, and are mounted at 25 degrees. After adding the air dam, I noticed the steering effort at speed was increased, which is a clear indicator of reduced lift/increased downforce. I'll most likely pull those off, since it doesn't seem like I need them anymore. (My goal for the aero is reduced drag with zero lift).
I don't have any mileage numbers yet, but I will once my tank is gone.
My fiancee's cell phone seemed to have raped the size of the first picure, so I'll try to take a better one today.