Bwhite - I made the same speculation about the advantages of suspending the lead shot in mineral oil in an earlier thread discussing possible tweaks to the Teres only to be told that this was not possible because of potential leaks (seems to me it would be pretty easy to keep oil from leaking out of a wood or acrylic base)
It also seems to me a that basic understanding of the physics would confirm your intuition that lead in air would be too resistant to movement to absorb the very fine vibrations that you would desire it to do. By suspending it in a more viscous medium, you decrease its effective weight but not its mass making it far more capable of absorbing vibration.
The Teres platter with lead looks cool but I wonder about its real effectiveness.
It also seems to me a that basic understanding of the physics would confirm your intuition that lead in air would be too resistant to movement to absorb the very fine vibrations that you would desire it to do. By suspending it in a more viscous medium, you decrease its effective weight but not its mass making it far more capable of absorbing vibration.
The Teres platter with lead looks cool but I wonder about its real effectiveness.