I have gen 2 and gen 3 touch HDS 7. Gen 2 came with boat and got the Gen 3 off ebay to match. I had issues dialing in with Lake O fishing. Lowrance tech support was not helpful. Told me transducer to use, bought it, and did not work. Called back and said I need a sonar hub as well which I did not buy. At end of the day bought airmar p66 transducer and run the gen 3 at 50 kHz. I run the stock 83 kHz transducer on gen 2 with split screen with chart. My settings are general fishing, low noise. With my color pallet I run 80 on color line, and a plus 2 and 3 on sensitivity. I can usually see my down rigger balls and do mark fish. However I don’t think I mark fish like others with different makes of fish finder. If I was starting over would not choose lowrance. By the way, the transducer is everything in my opinion Sent from my iPhone using Lake Ontario United