I have a VTI steel rack and supplement component isolation with
- Brass cone feet on every component
- a granite tile (18" x 15") for the component ti sit on
- a layer of drawer liner foam between the granite and the shelf
- sorbothane pads between the shelf and the steel framework
- I could load the legs of the rack with shot or sand, but it works fine as-is
Works like a dream - have no issues with vibrations
Regards - Steve