I believe you might be experiencing some VTA or tracking force issue, related to the thicker 45RPM LP's. My first Benz seemed to be senstitive to the changes of LP thickness. I remember reading about Fremer's DIY trick about changing VTF when using a thicker LP to overcome VTA issues. It might work or not, it did for me. I have sinced upgraded to the LP S and have not any issues regarding distortion or tracking. I use an SME V arm and track at 1.8 grams. I aligned with the SME arm guide and the Mobile Fidelity protractor.
Good luck.
Ciao,
Audioquest4life
Good luck.
Ciao,
Audioquest4life