Actually, the issue is the wing pulling up on the trunk lid. The rear of the wing support is pushed down but the front is pulling up on the trunk lid. So extra material makes sense especially for the front.
What you really need to do is make the rubber bump stops on the trunk lid solid and reinforce any spots where the trunk lid bump stops come into contact with the chassis sheet metal.
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2018 F30 320iX Melbourne Red
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red
2000 E36/7 Z3 Steel Blue
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