Pic of wheel cover attached... have only done the fronts so far (the rears still have the balancing weights on the outside, plus I've got the skirt back there).
A-B-A testing and data collection is looking less likely now... I purchased a 2000 Jetta TDI back in October (and seem to be getting some amazing numbers even without any aero mods! ... though I haven't had a chance to calibrate the ScanGauge since I haven't gone through a full tank yet)... so the Jetta will be my focus in the upcoming months.