I also installed a steel plate, from Callaham guitars, on the bridge pickup. According to Callaham, it boosts the mids and lows which are typically thin on the bridge pup and gives it a wider, fatter sound. I can vouch for the improved sound with both these modifications.

You also see the shielding on the pickguard from copper foil sheets. These are the Fender Cusom Shop Fat 50s here.