I have a 898c SI and I can't get it to show fish with down imaging. I went with a buddy that has an Elite 5 DSI and it was really easy to see bait balls and even fish around the bait balls. We would find fish on his fish finder and then stop and catch them. I tried some of the spots the next day with my boat and couldn't figure out how to make the fish show up on my 898 using down imaging. I caught fish there, but they just wouldn't show up on my humminbird like they did on his Lowrance. I played with the settings, but never could get it. I also have an Elite 7 ti, but don't have the transducer for it. It's connected to the built in transducer on my trolling motor, so it only does 2D. Should I invest in the total scan transducer for it or will the 898 work if I get the settings right?