Torker, all the comments here about the line counters on reels also apply to your downriggers. If your rigger balls show up on your sonar, set your counters to a common depth you fish per the sonar. Or you can measure on the ground to a common depth, say 60', set your counters to that depth with the line pulled to it, and then bring it in. You'll be surprised when you retrieve the line and the counter says some odd number instead of 0. But at least if you want to go to 60', you know that setting is accurate and can "adjust" up or down from there.