Robs, yes the Guys here at (Omiga) have undertaken work for repsected companies with these vibration free air tables, in clean rooms, sort of an anocoic chamber for vibrationless enviroments, Not for audio, and the lengths that are gone too to obtain a completely free shake zone is mind blowing, however it give a great insight as to how much normal everyday vibrations effect even the most unassuming things even hifi equipment  WM