There has been so much said and written about the Foz meter's failings that I personally stay away.
IMO if you buy an expensive cartridge (say, more than $700 or so) I would not accept it unless the stylus by a very careful examination by eye and by loupe is straight with the body of the cartridge. Peter maintains that should be true with his cartridges. It is also true on my Shelter and Audio-Technicas. That way you would be able to get a first, and very good, approximation of good azimuth by lining up the cartridge. Many of them have a horizontal line at the front. That is shown on the cartridge in Peter's video. It is also on so the Shelter and Audio Technicas.
What I do, while a record is playing, is to shine a small flashlight on the front of the cartridge and adjust the azimuth so that the horizontal line lines up parallel with its reflection on the vinyl. This is usually good enough for me, certainly on the A-T. But it is easy enough to make very small adjustments afterwards if you wish and listen, listen, listen.
The ear is the ultimate judge.
IMO if you buy an expensive cartridge (say, more than $700 or so) I would not accept it unless the stylus by a very careful examination by eye and by loupe is straight with the body of the cartridge. Peter maintains that should be true with his cartridges. It is also true on my Shelter and Audio-Technicas. That way you would be able to get a first, and very good, approximation of good azimuth by lining up the cartridge. Many of them have a horizontal line at the front. That is shown on the cartridge in Peter's video. It is also on so the Shelter and Audio Technicas.
What I do, while a record is playing, is to shine a small flashlight on the front of the cartridge and adjust the azimuth so that the horizontal line lines up parallel with its reflection on the vinyl. This is usually good enough for me, certainly on the A-T. But it is easy enough to make very small adjustments afterwards if you wish and listen, listen, listen.
The ear is the ultimate judge.