the platter is attached to a steel collar below and it is that to which the magnet affixes.
the callas mod was all about being able to fine tune location of bearing (vertically). with the granito i have that adjustment via a bolt beneath the table. just need long spanners to get to it (size 17).
belts arrived today. i can't get the platine to spin slow enough now (HA!). but of course this is simply highlighting that i haven't the correct lubricant. i am using a very light synthetic lubricant. it is too light. as per JC Verdier's design i will now use ROCOL X5 Ultraglide. This will create a little resistance which will mean i will come into a better place for achieving speeds i need but also the drag obviates stylus drag as per Verdier's design. i wouldn't be surprised if it makes it a little quieter too as i think it will be slightly dampening.
transrotor belt is skinniest. gold ring is a mm or 2 thicker. ebay EPDM belt is grossly thick. they all seem to achieve the same results at this stage. Wow no better than 0.04 rms. speed variation down a little but still about 0.15 rpm absolute. hope to improve both these numbers with the right lube. i have 5 kg coming so if anyone needs some, please reach out (or if anyone needs magnets).