wow, i just read that link, and the RCA grounding they did is overkill IMO, i just pulled the heat sink off the back and wedged a piece of clean copper wire between the RCA ground and the case.
to be more specific, the outer terminal of the RCA is linked between the two jacks, its covered by part or the head unit casing, so thats where i put the piece of wire, then i put the other end under the screw that holds the jacks in place.