I have a Kuzma XL, all machined brass on the big Minus K bench top and use the stand supplied by Minus K. But I use an HRS isolation platform on top of the Minus K, beneath the turntable. I've never heard any ringing and believe me, my 104 db sensitive speakers would pick it up.
You might check in with Minus K as well. There are sorbothane squares (or a square) between the inner mechanism and the underside of the top plate. Depending on how old your unit is, I think those age out after 10 years, but I'm operating from memory.