Some of the older hollow Gibbys, such as the 335, had small cans that would enclose the pots, jack, and switch and attach to ground to provide shielding since you can't line your hollow with foil tape as you would the compartment of your Tele. I dug online for a while, but could not find any available for sale that weren't an arm-and-a-leg, pulled from an old Gibby. Stew-Mac didn't have them, no place I saw on eBait did. Has anyone used them when doing upgrades on their Gretsch? Anybody know where a bloke can find them for a reasonable price? Thanks.