Cartridge setup experts: Azimuth critique

I see the same thing so would give a try to get more accurate

Impossible to see on a microscopic level.

Play some Joni Mitchell Blue (or a little Wayne Newton 😆) and listen for detail vs Sibilance. That should tell you everything.

If sibilant, simply rotate azimuth towards the channel that breaks up first - clockwise for inner groove left channel & vise versa while observing proper anti-skating.

@ketchup , It has to be exactly perpendicular to the record. If I can easily see it at a casual glance it needs to be corrected. 

@ketchup  IMO you're way ahead of many of the posters here. First, you recognize that lighting is a factor, and that it's tricky. Second, you realize that perpendicularity is a matter of degree in the real world. Third, you know enough to ask for advice. Fourth, you know your tonearm and how repeatable the adjustments are, and how hard it's going to be to improve on what you have.

I say, play something. If the channels sound more or less equal, that is volume and distortion, leave it alone.

Just my opinion.

Perhaps it is indeed a placebo effect, but, when I use adjust + to set the azimuth I am consistently impressed by the more lifelike imaging.  I also notice that very small adjustments on my Kuzma arm result in better electrical results.  No way I would be able to visualize these differences with my USB microscope.  The stylus looks good both at reference levels parallel to the surface (love the Wally Reference Tool) and at the final Adjust + optimal settings. 

These are not night and day differences but its enough to motivate the effort. And much more of a pain in the butt with a Jelco style headshell.