Another little tweak I've been banging on about on Vinyl Engine regarding the AP76/86SB and all other related models using this basic chassis. On the platter's inner hub just below the toothed part (that engages with the cam), there may or possibly should be a rubber o ring which breaks up or turns back to tacky liquid (or both
). The mech is truly silenced when a suitable o ring is fitted here - 13mm x 1.5 for the earlier models and 13mm x 2mm for the 86SB (and by inference, the Zero 100SB too). I don't have an early AP75 or SL75/95 to hand, so cannot reliably say that these are the same, but examination will show if there's a tell-tale groove just under the geared part on the inner turntable hub.