IMHO, it has more to do with people pulling them out and putting them back.
The craze for de-snorkelling etc plays havoc with the delicate plastic veins that hold them in.
Personally I cannot for the life of me believe that Porsche or the aero dynamic bods at Porsche said..I know lets make these different?
I have measured mine and they are mm perfect.
Just my opinion and my car.
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Don't care......was made to care! (my Mum)
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