Super G - I don't have any experience with adding snap weights to copper, but I personally would put the weight on the backer just past the copper connection.
As far as your setup, you'll have the riggers, then the dipseys, then the copper ... as you get further from the boat. Put the dipseys in rod holders that point straight out from the side of the boat, with rods that are long enough to clear the riggers. Put the dipseys on a 2 or 3 setting to get them away from the boat (and your riggers).
Good luck!