I've given the freshwater lakes a shot, unfortunately haven't had any success yet. Some observations I made was that I need to discriminate out the 1-06 to 1-09, Lake Huron if full of rocks that come up with that FeCo, and avoid those real deep targets, usually end up being a scrap of metal I don't want. . I haven't gone in very deep, waiting for waterproof headphones, not much luck on shore either, found wide open was too overwhelming with all the foils and garbage. Definetely notice the ctx goes deep on and off shore, just haven't perfected beach hunting, its a lot more difficult than inland.