I figure my Heartfield Prophecy has star grounding because I see that all the ground leads (black wires) are all grounded to the back of my blend pot. Questions: 1. If I was going to shield the control cavity and the control cavity plate, is it all right if I moved the ground point from the pot to a point on the shielded cavity? I may have to do some wiring mods because I have at least 7 wires connected to the pot. 2. If I'm going to shield the cavity, would it also be any more effective if I shielded the pickup cavities (which I hear is a real pain to do)? If I did, how would I ground that?