My turntable uses a Linn LP12 main bearing and sub platter, although it is very different in many (if not all) other aspects. I recently modified it so that the bearing is now levitated on opposing magnets. The modification can easily be reversed only requiring a small adjustment in VTA. I have been very happy with the results and intend to further explore modifying the internal sprung suspension elements to make use of magnetic repulsion.

The pictures shown above are actualy of an earlier prototype and the current model is different in a number of key areas. The lower magnet array is now a single large ring magnet, half the number of magnets are used in the upper array and a shielding disc is also used. Unfortunately, I havent got round to taking pics of the final design (MK4) but have been using it quite happily with my Naim ARO and Troika foer a couple of months now.