I went to Bass pro last saturday to buy a new depthfinder. Was looking at the HB and Lowrance models that had the Down scan. I talked to the guy in the electronics dept for almost and hour. He really let the wind out of my sail when he told me that the transducers for thes models can NOT be mounted on your trolling motor. Is this really True? Does this guy know what he is talking about. The reason I ask this is because he said he does not own a boat. Not that it matters, just sayin.