Matthias,
The photo above that you recently posted introduced something new to this discussion that hasn't been previously noted.
Are you aware that the brake master cylinder in your photograph, on your car, is not the original master cylinder but an aftermarket replacement?
You previously stated changes to the brake system, such as Wilwood upgrades, are very difficult to get approved. I fear your nonstock master cylinder whether it is Wilwood or not will prove to be a large problem, based on what you have previously said.
Larry
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