The fact that a ball bearing enhanced platter stability on one particular PV doesn't prove that it would do the same for every other turntable.
Much depends on implementation. If the lateral bearing tolerances are tight enough to maintain platter stability and prevent "rocking", a non-contact vertical support might indeed be capable of excellent bass and dynamics, as Nsgarch has found.
Your friend should be cautious of deducing broad general principles from a single example. "Cogito, ergo erro!"
Much depends on implementation. If the lateral bearing tolerances are tight enough to maintain platter stability and prevent "rocking", a non-contact vertical support might indeed be capable of excellent bass and dynamics, as Nsgarch has found.
Your friend should be cautious of deducing broad general principles from a single example. "Cogito, ergo erro!"