I believe the SOTA (I've owned two of them) and the ET were/are very good products. And I remember that was a popular combination at one time.
But I could never understand mounting an ET on ANY suspension table. If the suspension was at all sensitive then the moving mass as the arm tracked the record would seem to shift things out of balance. Consider that the fulcrum point of the tangental arm moves, as compared to the stationary base for a pivoted arm.
I once owned an Oracle and it also seemed to be popular with the ET arm. In my experience balance was difficult to maintain even with a pivoted arm. I'm not certain but that may have been corrected with later versions?
But I could never understand mounting an ET on ANY suspension table. If the suspension was at all sensitive then the moving mass as the arm tracked the record would seem to shift things out of balance. Consider that the fulcrum point of the tangental arm moves, as compared to the stationary base for a pivoted arm.
I once owned an Oracle and it also seemed to be popular with the ET arm. In my experience balance was difficult to maintain even with a pivoted arm. I'm not certain but that may have been corrected with later versions?