Any thoughts on my fairly unique solution? A 9kg Al platter, but the lp rests on a half dozen small Delrin pods bonded to the platter ie not contact of lp directly w platter.
I then use a heavy periphery ring and medium mass (450g) record weight to mate lp as fully as possible to the Delrin pods.
Well, it is an old idea. Out local Michell Enginering distributor owns the Transcriptor Hydraulic Reference - I see it regularly on display. I never listened to it, it is now a collectible.