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Rings won't wear in for that short of duration. The cylinder walls in the 911 are a lot smoother crosshatch wise vs a common V8 which when honed IIRC are 4 times rougher accelerating ring seating.
I don't like taking new motors to redline until at least 500 miles (debatable topic!) but the higher RPM decels supposedly helps seating rings. Maybe try some big hills if you can and just rack up miles period.
Only alternative is to teardown motor but not enough miles are done yet.
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