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DIY upgrades to VPI platter

I have the platter that was offered both as an upgrade for the HW-19 as a TNT platter and it served as the platter for several other TNT series. (1/2" acrylic bonded to metal) w/ three leveling screws.

My question/observation is... while I've played around with heavy weights/clamps like the TTWeights 2 + lb clamp, what I heard was a deadening of the sound, squashed dynamics. I can only assume this bearing (the Mk IV for the HW-19) wasn't meant to carry much more weight than the 20 lb. platter. Has anyone tried drilling holes underneath the platter around the perimeter and filling them with melted lead/brass? Would this be the same additional weight that the bearing sees if the weight is put directly on top of the platter as in my first observation with the heavy clamp?
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slaw OP
20,429 posts
 
I guess I should have mentioned my ultimate goal first, which was to increase rotational mass as Brf alluded to. The problem as I saw it is if the additional weight from my 'idea' would be so much a killer of sonics to nullify any benefit.

I modified my table to accept Symposium rollerblock jrs and I use a BDR clamp. The outer ring really won't work as I use an ET arm.
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