Geoffkait,
I don't see the point in quibbling with every comment, particularly when they are meant to just to illustrate a general point, which I think we all agree--nothing is perfect, so it did not make sense for the OP to harp on the manufacturer's claim.
As for the specific application of using a Relaxa under a turntable, I certainly think that it can work, but, I think there are way too many variable to say it will work under all or most circumstances. For example, will it reduce or make footfall problems worse? This would depend on the resonant frequency of the entire system and that would depend on a number of factors, including the mass of the table. When a manufacturer builds a spring suspension, or in the case of Verdier, a magnetic suspension, the manufacturer at least has knowledge about that variable. Also, most tables with suspensions allow for some tuning of the springs. I would be at least concerned that something like the Relaxa will not be quite as flexible in this regard.
