If you want to give the black box a try, I have one I'll sell you cheap. Its been on my boat since I bought it, hooked up to four downriggers, but I've only used it once or twice. Honestly couldn't tell you if it makes a difference or not. I catch quite a few without it, so never felt the need to bother with it. Send me an email if you want it. Only bad thing is that its on the boat and I won't have access to it for a while.
