"
Azimuth is best set by the mirror method."
Wow, I might have fallen off the turnip truck but that statement is incredibly incorrect unless your sir name is Superman, nee Kent. Since none of us have the microscopic vision to see the diamond in the groove, let alone x-ray vision to observe the coils/cantilever alignment. The best way is to measure distortion of the L and R channels on specified disc and attempt to get them as close as possible, then fine tuning by ear. The only system currently
that I can find
available since Feikert no longer sells the Adjust+ is AudioMagik.
Back to the original question. I own the WallyTractor and the WallySkater. Both are easy to use with excellent step by step instructions. I have used paper guides, MF GeoDisc, Brinkmann's Protractor (similar to Feikert), and the WallyTractor to set overhang and alignment. The WT is easily the most versatile and easy to use, especially if you have failing eyesight. The laser etched lines along with the mirrored surface make adjustments a breeze. The alignment guides have three parallel lines etched so you are able to avoid parallax, very helpful, actually essential.
There is much controversy about anti-skate to have a "perfect" setting. At the very least the WallySkater can show if you have too much resistance in the tonearm, be it bearing or wire. It can not be used on uni-pivots though. Call or write before you purchase.
Cartridge set up is a combination of VTF, VTA/SRA, azimuth, zenith, and anti-skate. The trick is finding the balance point to where all parameters are nearest to tracking that tiny stone perfectly deep into a tiny groove at 92 degrees aligned with the coils, moving in and out, up and down. Even when you get all of those parameters close there are only brief sections that are perfectly aligned. Welcome to the madness.
The man running WAM Engineering is J.R. Boisclar and he could not be any more helpful. If you have any question about cartridge set up you can reach out to him for guidance any time. Always a positive experience working with J.R.. My order was in the mail and to my door within a week, before Covid-19.