You mentioned that it is a belt drive turntable Without knowing the turntable, I can’t know if this is a possibility. Rather than trying an outboard arm pod, would it be possible to try an outboard motor with a long thread around the platter? You might be able to get a really good motor and controller separate and isolated from the turntable giving you an even better final result.
it’s hard to imagine what a solution might be without knowing the design of the turntable and how the motor is connected to the plinth.
Seems the manufacturer needs to do some more design work. It's now silent at 33 but not at 45rpm. 45 rpm is 37% faster speed x 3 motors should have been tested by the manufacturer one would think
Not sure is 230 volts 50hz vs 120 volts 60 hz for USA adds any potential issues
