I listen to records I am really familiar with for the final tweaking. In my case, I don't have very expensive tools or a sophisticated arm that can be adjusted accurately (Audioquest PT-6), so it seems pointless to completely rely on measurements. I get better results anyway by making slight adjustments by ear. My current arm/cart combination sounds best with slightly greater VTF than the cartridge recommendation and very low anti-skate.
But for sure this stuff can drive you crazy.
I place a portion of an index card on a record and visually compare the armtube angle to the index-card lines to set VTA to level as my starting point.
But for sure this stuff can drive you crazy.
I place a portion of an index card on a record and visually compare the armtube angle to the index-card lines to set VTA to level as my starting point.