I have an old 798 SI. I noticed today that the wire is bare just above the transducer. It seems to work, but is showing more debris on the screen. I realize a new transducer or, better yet, a new unit is in order. Would a thin layer of silicone be a decent band aid? I’d like a new unit, but I have a few big Lakemaster chips (not the micro) that wont fit many units. I have a Lowrance on the bow for some reason. HB mapping is superior. What’s the best SI unit to buy to accommodate these chips without breaking the bank? Lots of questions. Thanks for the help. Sam