I am learning some other interesting things about the hole parameters.
If you create a note and you make it's parent a hole feature, you can use the hole's "hidden" parameters in the note as long as you can 1) remember the capitalize the variable and 2) include the &. It seems to be the only way you can access the holes note variables: (I know there is more if more parameters are specified for the hole)
&METRIC_SIZE
&THREAD_SERIES
&THREAD_CLASS
&STD_HOLE_TYPE
&VAR_THREAD
&THREAD_DEPTH
&NUMBER_SIZE DRILL
&DIAMETER
&VAR_DEPTH
&DRILL_DEPTH
&PATTERN_NO
I can see no way to use these particular variables in directly in relations. They are somehow buried in the feature which only note annotations can access as long as the associated hole is the parent. Oddly enough, the note's leader doesn't have to be associated with the hole, or even have a leader at all.