Turntable Isolation

Solid Tech - feet of silence will solve your problems- worth every penny!

@polkalover I am a advocate of Solid Tech 'Feet of Silence'.

I have these as footers that superseded all others used on a particular weight of TT. Those who I have loaned these to but wished for a little more weight to be supported have fabricated their own suspension platforms based on the design/SME Design.

I have heard these DIY Version in use against the users previous footers and their DIY Types of suspension platforms, and am totally convinced that everything the   ' 'Feet of Silence'  can create as a sonic improvement/attraction is present. .

If a Densified Wood was used as the Platform I am certain these DIY versions will have been a further improved design.  

If your problem is a floor that moves when you walk, get yourself a turntable wall-mount.  Because you have a VPI Signature 21, I'd recommend going to a local shop that does metal fabrication and have one made for you.  Those VPI tables are very heavy.  

You'll need to get a handyman to attach it to your wall with lag screws into studs.  This will need to be an extremely sturdy platform due to the weight of your table.  Keeping in mind that this is a $10k table with a cartridge to match, spending a few hundred bucks shouldn't be a big deal.  You want to get this right.

A wall mount completely isolates you from anything your floor is doing.

Going a bit further than what @elliottbnewcombjr recommended, you can go with Mapleshade’s complete vibration control system.  A bit much visually, but I have found it to be effective, both in protecting from footfalls and cleaning up the treble at higher listening volumes.  Also considerably cheaper than the Townshend or some other solutions.

https://shop.mapleshadestore.com/Vibration-Control-Systems_c_23.html

kn

My gear sits out in the middle of my room, no walls around it.