@mulveling Thank you for your description. After my Benz Ruby 3 wore out, It was a little anemic dynamically but beautiful sounding and tracked perfectly. I replaced it with a Dynavector 20X2 L. The Zesto Allesso (and others) SUT works great with the Dynavector but the Ruby always was very touchy in my system on the end of a highly moded SME IV arm as to impedance (220 ohms only). So, those five Dynavectors I owned prior to the Benz also avoided magnetic flux build-up in a way. Great to know and I will pass this info on to four friends who use Dynavectors.
Also, Gullwing comparison to 2MBlack. My best friend Robert (also known as Mr. Record whose column appears in Pos Feedback) tried a 2M Black for a few months and gave up on it. It was great on 15% of his LPs and just bad on everything else.