RE"Using an angle protractor only assumes that the diamond is "perfectly" aligned on the cantilever."
I set mine the way that Harry instructs, the only thing that I add is a quantitative factor, that is a measurement, which is both repeatable and reproducible. In this case using your ears results in to many variables, e.g. how tired you are, state of mind and all kinds of stuff like that. Even if you adjust it for your ears, the result will be good for only those records that were used to set it. Apparently the method that Harry chose to set the alignment works, because the table sounds great with a variety of records not just a chosen few.