I shifted a month ago to cast iron uprights exactly for that reason.
Alu uprights is a disaster and awful example of german engineering.
Tactical solution: buy new alu uprights from Audi.
They will last until upper arms are due to change again.
Proper solution: migrate to cast iron where problem doesn't exist. They will require lower arms with wider tapers and othe small things.
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I'd rather drive on left
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