One of the most ridiculous concepts put forth by some non-technical turntable experimenters (can't call most of these guys "designers") is the concept of multiple motors. Not necessary, and they introduce more noise, more instability, the reality of beating against each other (search "beating" of 2 frequencies), and other problems. When you see multiple motors you at least know quickly to search other brands.
How much would an additional motor help
Just wondering what advantages there would be?