I figured out how to do the width dimension but I can’t figure out how to get it to ensure correctly for this dimension call out . I tried it with lines and planes and neither worked .
I cannot recall and don't have an older version loaded, but you could also create a generic circle and populate it with the slot mid point XYZ/IJK, width size as feature size. This will enable you to select the (M) for the features.
It is not the BEST practice, but it is a long standing work around when dealing with widths and position.