Based on all your kind replies I've decided to go with the Ortofon DS3, price not being a factor considering the potential hazards when handling cartridges.
Years back (around 4o yrs?) I started with a shure balance beam- it was very accurate. Then I splurged on aa very pricey digital scale from the UK. Total crap. About a year or two ago I bought the Riverstone (about $30) and I'm delighted
Actually in my view the better ones have a calibration weight to eliminate any variance from depleted batteries etc.
I have used the Technics Strain Gauge SH50 for many years, which includes a calibration weight of 1.5 grams and the ability to adjust the gain to precisely match the calibrated weight.
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