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I do not agree with the hysterical people found in different posts in this forum afraid that every return of a nMP might make them wait longer for their ordered nMP.
I believe that such an expensive machine cannot show blemishes either inside or outside and if something can be done to improve its production, then it should be done.
However I agree with those who mentioned other problems still unsolved, much more annoying and not present in your computer according to your experience.
The kind of noise reported by many users is in my opinion a much greater problem that scratches inside the computer.
To get a scratch free machine which however makes annoying noises would be a very bad change.
I hope it does not happen to you.