TIGER PAW "Tranquility" (Magnetic Bearing Repulsion...) Any Good?

Even that approach is not entirely novel. The Kenwood L07D also uses partial magnetic levitation to reduce the downward force on the bearing, but the spindle is in contact with the bearing.

Geoff, So long as the belt (assuming a BD drive system) is in direct contact with the platter structure, I see no way there could be "slippage" or excessive compliance if the platter is suspended magnetically.  Although I guess you may be referring to an interaction of magnetic fields that can dampen the rotational inertia of the platter.

If what you say is true there is no issue, but unless I misunderstood, Daveyf’s post of 6-16-2018 suggested the drive is magnetic a la the Transrotor TMD system. Sorry if I and others got it wrong.

Davey, Is it correct to infer from your post that with the Tiger Paw mod, the belt drives the actual platter only indirectly, via the magnetic connection between the TP disc and the platter?  This would be much like the Transrotor TMD option, I think.  I agree also that the additional compliance introduced by the mod might adversely affect speed accuracy. I would also say that the LP12 bearing was designed to bear the weight of the platter; so why mess with that, if it introduces a new issue such as this one?