Now why did you have to post those pics of the 997.1 diffuser? Another mod I will have to add to my list.

 

I'd think there would be a good size demand if the werks 1 style was a simple black plastic or PU product. Tough to sell 3500 dollar CF aero that can barely be seen, and likely may be damaged. For those that don't want to change out the movable rear wing, and would like the benefit of the "best type" of downforce, I'd think if it came in at or under $1000, IT WOULD SELL!!!!!!!!

 

Vorsteiner rear diffuser on member Bigboi's911s car:

 

I have looked at those. Not truly functional, more of a valance. To be functional, like in the werks1 video, it needs to draw the air out from under the car and speed it up to match that of the air foil design of the car, reducing lift.