"Straight" talk

chakster.... who told you that?  ..just saw VandenHul...... this is not a hard and fast rule.  Maybe for VdH, but not as a universal rule.  Also, in regard to the arm used....   If the bearing is at a different angle than is the headshell/cartridge, the azimuth is constantly in flux ...changing with the rise and fall of the warp...not good

Chakster, I know I´m right and I completely agree with A. J. Van Del Hul.
Well, he is a specialist isn´t he. And he´s not the only expert with that opinion/experience in this complicated business.
Most of my carts perform best with flat or/and a bit high position but never in low position (then highs become worse both quantity and quality). Many things in analog /physics are simple atfer all.
But I must admit the Foz gadget is quite tempting...

According to www.analogplanet.com , the later versions of the Foz are self-calibrating.

Regarding setting azimuth by ear... some rooms are not symmetrical and there may be other room circumstances that would be beneficial to set azimuth by ear. It is more fun.

@stringreen,

Why do you dismiss offhanded (setting azimuth by ear?)

With the 3d arm, this operation should be quick and easy. And an experienced music listener such as yourself, should be able to perform, no problem.