Hi all, I am in need of a new fish finder with that said I am 60 and I don't want to have to go to school to learn how to use this new instrument. I am hoping to retire in a few years and plan on seeing how long it takes to wear out a set of rod and reels. I value your opinions on this purchase. BTW my "new" fishing lake will be Dale Hollow and I want to fish for smallies as well as crappie. Thanks for your help. Mac