Technics Overhang Gauge
Ratings & Reviews
This handy tool although it's made by Technics can be used with any turntable with bayonet type headshells. Just measure back from the end which is 52 mm and then scribe a mark with a sharp pen. After I got it, I found that all my cartridges were off and it did make a difference in the sound after adjustment.
One more thing. If you happen to have a Sumiko headshell with two pins, just groove the bottom slightly as the bottom pin is closer to the rubber grommet.
CHEAP AND EFFECTIVE