When I fish lakers, SPEED is the most critical element of the technique. Knowing the temp and depth at the ball is wasted info 99% of the time. I run Hammerheads and find they thump too hard at anything over 1.8 mph (at the ball) and catch rates drop dramatically. Being able to duplicate speed and keep the speed under 1.8 is the number one key to successful laker fishing. Do we really need to know temp depth and speed at every lure? With different conditions at different depths, you will never get the speed right at every rig. Trolling in a S pattern will change speeds and cause a happy medium for every rig. All the extra crap is not needed. We tend to over think the art of trolling as it is.