Hi guys,   Working on an old Pierce movement that initially needed a new balance staff. Got that sorted just to find that the wheel has a severe wobble. As far as I can judge it’s not my riveting that’s faulty but more likely the arms that were a bit skewed.   Have been thinking to get a truing caliper (or whatever the tool is called) and just laid hands on one of the dual versions.   As far as I can judge one of the sides has tiny holes that seems suited for the staff pivots and the other