Most of my vert jigging is done in colder weather with water temps under 55*. Last winter I fished 40 to 55 fow and found fish from 30 to 38 feet deep along standing timber. Several years back I fished a bridge support in 20 to 35 fow and found fish scattered all through the area near anything on the bottom, very strucure oriented. I use 8' BGJP's with 2000 sreies spinning reels and 10/2 power pro braid. The no stretch transmits the lightest of bites and gets all but the worst hung jigs back. It also helps with the hookset at the deeper places they live that time of year. Changes come when water temps rise in the early spring and thru summer, and the deep stuff is gonna start again after turnover. I can't wait.