Double rig here a lot at river . Depending on conditions flow , water level , were the fish are determins what weight I use . May run double 1/24 oz up to 3/16oz . 10" to 18" apart and upper is always tied off with a loop , and useally run 2 different size body's if using plastic . try to do the same with jigs . Don't want to drop past the fish to fast , but yet need to get to them with the right presitation .