I think this is true: The longer the arm, the more accurate one must be in mounting it in order to take advantage of the theoretically superior groove alignment. We are talking about tolerances well below 1.0 mm.
In addition, the longer the arm, the higher the effective mass for a given material, which must also be taken into consideration.
In addition, the longer the arm, the higher the effective mass for a given material, which must also be taken into consideration.