I ever made the following joke. ''Are you listing to the music?''
''No I am still adjusting''...
I use those small ''levels'' on the headshell (on the record). The
job of the manufacturers is to produce correct cartridges without
''deviations''. If so than ''parallel adjsutment'' should do. Those who
own many cartridges and enjoy their ''rulation'' have no time
for ''endless djustment''.