All he needs is the test record which will account for any wear and inaccuracies that the math won’t account for.
exactly, i have no idea why people prefer to make questinable calculation on paper if they don’t even know where to start, because their cartridge compliance stated at 100Hz (not at 10Hz) which will make all the caltulation way off.
Insted they can buy a Test Record to play B2 and B2 tracks and actually watch the arm and cartridge shaking together at the certain range of resonance frequency. This is practical solution, not a theoretical math on paper.
But for the orthodox there is a theoretical aspect printed right on the record sleeve.