In my experience anything to do with the Tonearm Signal Path has a obvious fragility.
I have a Silver Litz Wire used as a continuous wire on a Tonearm. I have lost a channel on this on a few occasions.
I passed the Tonearm on to an individual who lives and breaths working with micro volts, a Tonearm is one of their destress jobs, Horses for Courses, is how I was taught.