I'm afraid I don't agree. Nearly all Fender Strats have a metal or foil plate behind the plastic scratchplate and this forms part of the electrical shielding of the instrument by virtue of being connected to the pots and therefore forming part of the shielding. It's not massively effective in rejecting RF (Radio Frequencies) though, so you might want to increase the shielding, either by lining the body cavities with copper foil, or by putting braided screen over the existing wires in the guitar's circuit and connecting that tp the rest of the shielding. In any event, you should take a wire from the casing of the pots and attach it to the tremelo claw, which is how all Strats come out of the factory. Otherwise, you'll get a slight 'open circuit' noise that will only go away if you touch the magnets in the pickup.
Simon Croft, June 2010
