I just got a lund crossover 1875 and i was going to mount those brackets that run on the rail only but only rated for a 24 inch boom and only a 10 lb. ball and at $80 each up hear in Edmonton Alberta I said no thanks . The tec. and lund says he normally just mounts the down rigger on the gunnel but first he glues some wood under the gunnel . So thats what I did glued a piece of 3/4 inch plywood about 15 inches long and 6.6 inches wide on the under side with PL premium which is 3 times stronger than PL200 I used a pair of clamps untill it tried . On the top side used used a piece of composite decking. Did not run it length wise with the boat but the other way . as it is only 5.5 inches wide and i wanted it to the edge of the gunnel . I did not glue this one down. I just bolted it down with the four bolts with the down rigger mount ..I fished all day July 12 with a 15 lb ball on Cold Lake . Nothing flexed.