I could see the 300 PLUS for silver ANYTHING, though.
I had 60 year old silver USAF surplus #12 cable. I almost chucked it, and sold it for weight. I was patient 35 years ago. ALL winter and half the summer. THEN they sounded like no other, UNTIL they were stolen, along with the remainder of the spools, 4 years ago. (Storage).
I now give SILVER anything, cable, cap leads, amps ( with silver traces)
silver KNOBS, even get extra break-in time. Teflon, Silver, 1000 hours.
YEP.. Is it worth it... YEP, if your patient...
Cabinet settling, STUFF seating, springs shaking.
It has to settle, in and on. SHAKING helps...KING size vibrator!!!
I say get a concrete vibrator. You ever see one? They have to stay submersed, in liquid or they BURN up..REALLY COOL!
I say if you set that in the middle of the room in a tub of mud. Put 200 lbs of sand bags on it, flip the switch, for 30 minutes. EVERYTHING will be settled. VERY WELL... Getting the mud back out of the room, might be a trick though.
Maybe do a "light lift" over the current wood floor, to loose the mud..
OR poor a couple of "Use later" plinths, for a project..
Concrete shoes, are a popular one.
My ticker is working fine, ok, then later on the shoes. ;-)