Interaction between Vibrapods and shelf material

For some time now I have had good results with my CDP and preamp supported directly on the Vibrapod cones and isolators, placed on glass shelves in a cherry audio cabinet. I'm aware that glass is a material that can be too resonant, but I was told earlier today that during their development the makers of Vibrapods learned that there was a good interaction between these materials. I have been considering switching out the shelves for maple and would be interested in hearing about anyone's related experience.

If I understand the theoretical purpose of the Vibrapods as isolators and/or vibration reducers, is it possible that there would be limited effect linked to the platform on which they're placed?
Just a word of caution, all the vibrapods I've used leech oils/residue into any wooden surface, effectively ruining any finish or surface they spend any time on. Beware. Wouldn't be a problem on glass, but they've wrecked speakers and shelves for me. I threw them all away.

More generally, isolation solutions are designed -- as you undoubtedly surmise -- to minimize the interaction between the component and the surface it is on. Thus, isolation is less dependant on the shelving material than coupling/mass-loading devices. There may be some interaction, for sure, as nothing's perfect -- but I would agree that the more effecitve the isolation, the less the interaction. Perfect isolation would make the base material irrelevant. Again, however, nothing's perfect.
I like maple as a support and sound damping material. I don't know much about oil being leach by the supports but I use Brass points.
I bought Vibrapods, years ago and while they were all rated well above the weight of the equipment; they all flattened out(the round hollow part). The ones I used with their cones, did not. Of course; those fit into a radiused recess, in the cone, which would preclude the flattening. I e-mailed the company and asked if this was normal twice and received no reply. I won't deal with them again.
Thanks for the responses. I understand that if I'm going to consider a change to wood shelves, then I would need to change to a different coupling device, like brass points or the Black Diamond Racing cones. I don't know if there would be expected, predictable differences from my current set-up. One reviewer I read compared the BDR cones used in the standard manner (with the points resting on the shelf) unfavorably to the Vibrapods. Then he switched the orientation of the BDR cones (on a wood shelf) and obtained a superior result.

Would either of these devices tend to have more interaction with a maple shelf and, if so, would that interaction be a desirable one?
In case you do have a use for the Vibrapods or any isolation device made from sorbothane, you can prevent them from staining wood finishes by putting a piece of plastic wrap slightly larger than the puck between them and the wood.
If the Vibrapods flatten out, you can put them in the oven and they'll go back to their original shape.
I had the same experience as Mezmo. They eventually made a mess of anything they came in contact with. Dont use them anymore either.
Thanks for the tip, Sfar. However, I'm certainly willing to consider moving on from Vibrapods. My main question is whether there is comparative experience with other coupling devices and how those devices have possibly interacted with their platform. Would there be inherent, expected differences between such devices on wood or glass and my present set-up?