Do not misunderstand, here I disagree with you. The normal roof spoiler and the one with tube do not have the problem that these shift slightly upwards.
I have now noticed that the side spoiler with the tubes, these are offset very far inward. If there are markers attached, it looks very funny.
I only give hints, what Wolli makes of it is his thing.
However, you are welcome to try it out for yourself.
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