Wouldnt you be defeating the purpose of a custom protractor by changing the spindle to pivot distance as an adjustment?
My admittedly limited and possibly flawed understanding is that pivot-to-spindle distance + overhang = a spot on the arc of a protractor designed for a specific pivot-to-spindle distance, 233.15 on the SME V. The way to adjust a cartridge in an SME V/IV is by moving the entire arm via its sled. If by moving the tonearm via the sled I cause the stylus to perfectly trace the arc on a protractor designed for the tonearm, doesn't that equate to proper setup? If I follow that method, is my cartridge not aligned correctly? (Genuine question, not rhetorical).
Tim