Hi. Ive just put a new Pick guard on my Lakland Duck Dunn and its buzzing really loudly. In fact i cant get any tone out of it unless my finger is on one of the knobs. On the back of the old PG is some silver foil that i assume is grounding the controls. On the new one there isn't any at all so im guessing this is the problem. My question is can i just use some kitchen foil on the new one or should i get something special. And if so what is it? Thanks for any help. I almost had a heart attack when i plugged it in just now. Thought i had ruined my new bass.