Here's a thought. How about splicing a piece of 40 # mono every 100' in your copper to attach boards. Use a small spro 80 # swivel on each end of the splice. Then you can set a 500 copper at 100,200 300,400 or run all way to 500. This will cut down on how many rods you have to carry to fish copper at different depths , especially for those with smaller boats!!!