@Rstek
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@ sean
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If you have not read through the whole thread
heres a recap
We built the original USR based on this
The Universal RSR: Lp Stabilizer Disc Ring Outer Record Periphery Clamp, Warped Records, Damping, Resonance, Realistic Sound Reproduction.
Dimensions: outer 13.520" Diameter x .125 thick. (3.0mm )
wt : 450gms
Material : High nickel alloy Non Mag StainlessSteel - density 0.29 lbs/in3 OR 7.99 g/cm3
this was the
USR MK 1 ring - 460 gms dia 345mm
later on the feedback of users we found a 200gms increase in the weight gave much better results on all TT's
this was how the MK2 was born
USR ring new MK2 version - 650gms/ dia 345mm/thicknes 4.85mm -
Note : we have also discontinued the acrylic centring disc on advice of users
Many users found the disc actually catches dirt/dust and transfers this onto the record also since it contacts the record grooves it tends to scratch the grooves.Hence it does more bad than good
im pretty sure most of us have steady hands and can make do without the centring disc
Later we made the monster USRs for the VPI turntables
these are close to 18mm thick and weigh a cool 6.5lbs
As for centre weights ( pics can be found on this thread)
Centre weight - Thorens Replica - 2650 Rs
Centre weight - Scheu inspired - 3850 Rs (550gms)
Oyaide inspired composite weight - (750gms)
i advice heavier weights.I think many weights availble internationally weigh 2-3 lbs
some weighing 5 lbs for VPIs