Oh, I forgot to add. You do not need a Fozgometer or an oscilloscope to do this right with modern cartridges. A good eye and the right tools can do this perfectly. Back in the day cartridges were all over the place. Cantilevers set in crooked, styli not perpendicular to the cartridge body not to mention internal inaccuracies. But today I have not seen a single
Ortofon, Clear Audio, Lyra, Koetsu or My Sonic Lab cartridge that wasn't dead on. Don't forget you have to use cartridges that match the effective mass of your tone arm. You can always add weight to a stiff cartridge but it is much harder to subtract weight from your tone arm when you use a highly compliant cartridge.
Ortofon, Clear Audio, Lyra, Koetsu or My Sonic Lab cartridge that wasn't dead on. Don't forget you have to use cartridges that match the effective mass of your tone arm. You can always add weight to a stiff cartridge but it is much harder to subtract weight from your tone arm when you use a highly compliant cartridge.