My Jaguar is noisey and I know from a search that all the cavities have to be grouded to each other to eliminate the noise. I saw the pic of the copper shielding tape coming up over the edge of the cavity and making contact with the shielded bottom of the pickguard. My question is how and what should the copper tape be attached to inside the cavity? Does it have to be anchored to the cavity wall with a screw? Is there another way? And should all the cavities ultimately be grounded to the back of a pot?