interesting davesnothere on those rods that were not on boards caught the most and right behind the boat.Those rods were definitely shallower than if placed on a board,but by how much would be hard to guess.The height of the rods off the water and the amount of line out behind the boat till goes in water.The trollers say that each 1oz ads 4ft of depth.I also think that the further down line adding the sinker will be deeper than if sinker closer to surface.Let say put on 2oz sinker after 15ft then 50 more to board for total of 65 would go deeper than if put sinker 35ft from lure then put another 30 to board for total of 65 again.I would guess this setup would only change depth of 1-2ft though.Most guys are putting weight 20ft from lure and changing the lead after weight to board.Think this way easier to use if get info over radio on leads and weights catching fish.