I do have one note on this: It appears based on the videos I've seen of wind tunnel testing on the cars that the rear vents aren't terribly functional even when open. The air curtain effect seems to be entirely about the interaction of the airflow from the front vent around the headlight area to the outside of the front wheel. It looks like it really does help produce a smooth laminar flow over the wheel area, but the rear doesn't play into it as the airflow seems to attach to the font door area behind the rear vent.Last week I checked a Taycan with electric charging doors + the 20' turbo aero wheels. I can confirm the vents are blocked.