I always do star grounding on my wirings and never had any noise problems, maybe you should think to try it Kenny.
Here's some info. http://www.guitarnuts.com/wiring/shielding/shield3.php
BTW, tone control? You? It's a joke, right? 
Noise is not the issue and everything is grounded, it's the lack of
any noise... The only reason I thought about the tone control is using the hole in the body as it's there now...
Now, PBG and Exiled...
1 - the RD pup screen grounds directly on the pot, the signal on one side of the pot with the output to the selector on the centre and to screen on the other side...
2 - the MB has a screen on the Belden which goes to the 4 way switch - the equivalent of the screen (black on the Belden) goes to a common screen point but the red (bridge side coil) changes how it connects, as do the other pair...
3 - the issue is common only when the pup selector is on both as the pots work as part of an individual circuit...
4 - the three green wires you can see running through to the common on the 4 way are all screen conns - it was just a convenient position to connect them...
5 - the choice of individual wires from the two coils on the MB was to enable the multiple options, and hopefully it should work, but it did not...?
PBG - you probably have the best circuitry knowledge round here - if you have a moment to take a look at my schematic and see if you can figure why it's doing what it's doing, I'd be obliged... I'll have a more in depth look as-soon-as...
Ultimately, this 'bird ran with one pup and one pot since 1988, so If I revert I'll still be happy - the sound-range I have right now is pretty phenomenal, and yes, I do intend to post, once I'm happy with the finished work...
