VPI Scoutmaster - Rubber Washer

Tom, the rubber washer's purpose is to keep the record from dishing when using the threaded clamp.

But once you upgrade to the periphery ring, dishing is no longer a problem. And since the platter is perfectly flat, having a washer under the center of your record while a heavy ring pulls down on the outer rim of your record would cause a reverse dish effect.

Don't use the washer when using the periphery ring. And as far as the center clamp goes just use the stainless steel one when using the ring.

Your threaded clamp and washer is for the most part no longer necessary once you make this up-grade.

I don't have the stainless steel clamp. Also, I did try removing the washer and the table didn't sound as good. I put it back. It's possible that, after removing the washer, I'll need to recalibrate VTF, VTA, and azimuth, and that is why it didn't sound as good.

Tom

Tom, the HRX-model stainless steel center "clamp" is not really a clamp at all in that it is not a threaded, screw-on mechanism. Instead the HRX center weight is simply a heavy (1-1/2 pounds) weight that slides on over the spindle and sits on the center of the LP. This weight is substantially heavier than the old Mk. 5 threaded clamp. When I upgraded my TNT to the HRX acrylic platter, I found that both the HRX periphery weight and the HRX center weight were important to the sound of the new platter. The new acrylic platter is much lighter than the older VPI platters, and I believe the HRX center and ring weights play an important role in dampening vibrations that were previously dampened by the lead and cork materials included in VPI's older model platter composition. For this reason, I suspect it is probably worth the $150 for you to upgrade your clamp to the HRX center weight design.