Do any of you use a "side looking" transducer with your depth finder? I've got an older Humminbird 400TX with a "wide side" transducer on a trolling motor mount, but the transducer has been broken since I got the boat, so I have almost no experience in using the side-looking feature. I'm debating whether to replace the trandsucer or just update to a more modern fish finder and not worry about the side-looking feature. It seems to me that the feature would be useful when trolling along a bank looking for bait fish or maybe a school of white bass chasing the shad. For those of you who have or have used a side looking transducer, is it a useful feature or just a marketing tool?