Grounding and shielding question. Looooong question.

[wokkaboy]

Hi Ken,
think you are over complicating things. The black hardware the bridge post should be conductive but wouldn't hurt to rub off a bit of black so the earth wire makes good contact.
As long as the switch, both pups, all 4 pots and the output jack are earthed to the bridge post it should all be earthed, so if all of these make contact with the shielding and the shielding is grounded you shouldn't need a separate grounding wire to them.
As for coil splitting the pickups you need pups with 4 wires - a north and south ending wire plus hot and earth wire. You can modify the supplied pups to do this unless you have upgraded to coil splittable pickups ?