Hi Alexg: Once owned an ADC-XLM moving magnet (MM)in 1980, i think your ZLM could be a sequel model i'm not sure. If it is, it's a low mass high compliance well suited for the SME3009 indeed. i've used mine successfully on 12" SME3012. ADC cartridges have very good bass extension and smooth vocal if the cantilever rubber suspension is still pliant. Tracking force is from 0.9 to 1.3 grams from my memory. Slightly higher tracking force (grams) will not harm vinyl. Satisfy yourself, experiment from the lower force upwards, you can hear it when it's correct. The rake angle is very critical, check that the tone arm is perfectly horizontal with the stylus in the groove. Good luck. Phil.
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