The Technics gauge is a convenient little tool and helps sets the stylus position at 52mm from the base of the headshell which achieves the 15mm overhang. Van_Isle had it exactly right.
Directly measuring overhang on it's own is difficult with automatic tonearm return mechanisms kicking in before you actually "overhang" the spindle.
Directly measuring overhang on it's own is difficult with automatic tonearm return mechanisms kicking in before you actually "overhang" the spindle.