setting the azimuth

eyes to closely approximate - ears to fine tune

If all carts were assembled perfectly "square" it would be a relatively easy matter, but thaty ain't ;-(

Exactly what 4yanx said, rough in by eye, fine-tune by ear.

He and I once shared ownership of a Wally Analog Shop, which adjusts azimuth by letting you measure and minimize crosstalk. It worked very well, but I found I could do just as well by listening for image tightness and separation of instruments and voices. I believe he found the same.

If you go thru turntablebasics.com they have mirror alignment protractor where you can see angle more presicely including certainly azimuth.

i use a carpenter's folding ruler that has the slide out on it, my vpi 10.5i came with a 6 inch rod and the arm is made with a grove in it for the rod to lay in, i sit the arm down on a lp and use the slide out to get the same fit on both sides of the rod, the area where the slide out meets the ruler is wide enough for this use, and it works very well. when i first setup my arm i used a 12 desk ruler, when i thought of this way of doing the azimuth adjustment i was off by almost a heavy sixteenth of a inch, when finished the ruler just touches both sides for the rod,