Hi Gmorris ,
I sent the subchassis back to Oracle- they drilled the holes in the underside of the chassis for three small threaded screws ( the lock nuts and the Delrin plunger attach to these).
The silicon "pots" attached to the granite base by way of double sided tape which Oracle had pre placed .So no drilling on the base needed. The tape is VERY effective and completely invisible.
If you are interested , my dealer gave me detailed instructions which are not part of the Oracle 6 manual. Following them made the whole thing very easy. Took a while because of the new arm and cart.
I've set tonight aside for a long session ; will play with the MVSS and report back.
Cheers