I have never used the tracking feature of the 70 and I am a bit confused about it. When you hit the button, can you start hunting immediately? When you get a good signal and you want to get it pinpointed, do you turn tracking off? One of the places I hunted today had some real big variations in ground balance numbers. One end of the field ground balanced at 23 and when I checked it at the other end(600 feet), the number read 34. It would seem this is the ideal spot to use tracking? I hesitated using it because I didn't want to chance missing anything. Ground balancing takes only a few seconds, but finding clean ground to balance in sometimes takes much more time. I would like to learn the correct way to use tracking. R.L.