For setting azimuth initially i sit my headshell flat on top of the azimuth block which sits on top of an old lp. Not as the maker intended but better than using the thin black lines. Then tighten the screw on the headshell just enouph to secure. Then return arm to cradle and tighten fully. Gives a good starting point. Audiomods have little cylinders which are very useful in different sizes which give a good starting point for azimuth & vta when the headshell sits flat on top of the cylinder. Choose one which matches manufacturer cartridge height when in play. I've used an Arche headshell, by far the best tool for dialing in a cartridge with micro adjustment of all parameters, bit of patience and you can't miss. For me it's good value to hear a top MC as it should sound. Must admit i've also bought/borrowed a fozgometer in the past using it once and returning for refund.
On VTA ; my advice is don't always assume you're hearing shrill highs because vta is too high as it more often than not is alignment that's out. I set azimuth close then vta to level then alignment has to be perfect before returning to perfect vta & azimuth. Also if vta is well off, assuming too much bass or too much treble is a result of too low or too high setting can baffle as i've heard too much bass when the arm is way too high and conversly too much treble when the pillar is way down.
For me, alignment is most critical, then azimuth, anti skate (on less than 2g trackers), tracking weight then vta, finally overhang which is over egged as even 1mm out doesn't make much difference. I've used my fr66s over a 5mm range and not heard a whole lot of difference.
It can be a maddening process, no exercise on The Cube tv programme comes close and at times i've sworn my next cartridge will be a spherical type stylus no matter how it sounds.
Or just go to a dealer but ask them how they fulfill the fitting as you might find your toolbox and skills are better than theirs.
Cheers,
William
Denon DP80, Fidelity Research FR66s, Koetsu RSP. Allnic t2000, h1202. Acousense streamer, Dac2/Afi/psu. Harbeth HL5 plus. Cardas cables.