My first table in the mid '70s was an Ariston I suspended from the ceiling by four engine starter cords (no stretch) and turnbuckles to a double layer spruce ply shelf. Then for years I spun an LP12 on a stock Sound Org. wall stand with its light MDF shelf. As long as I caught the studs it worked beautifully with no mechanical or acoustical vibration. Now I have a 75 lb. Final Tool MkII resting on a RixRax Maple sandbox on a RixRax 2-level stand. Total mass under the 75 lb. table estimated at 200 lbs. It sits on a concrete floor and again, no vibration problems whatsoever. What I've learned is that it depends on the type of deck (suspended vs. high mass unsuspended) and type of flooring (sprung vs. unsprung).
