stevecham
serginhoparkour
It is not the arm but the protractor.It’s not likely that Ortofon provided an inaccurate alignment gauge.
serginhoparkour
... after some research I decided to use Conrad Hoffman’s Arc Template Generator...have you tried by any chance?Is this one of those you download and print yourself? If so, how can you be sure the printed image is of the correct size? If it is off by even a bit, so too will be your alignment.