I'll be hauling out the boat for the Winter and dropping the mast for new wiring and standing rigging. I also plan to replace Datamarine intruments with Simrad IS20 wind and depth/speed. I currently have two through hull transducers in close proximity, one for depth and one for speed. The Simrad only uses one transducer for both depth and speed. Is there a good reason for removing the left over, obsolete transducer? I like the idea of one fewer hole in the bottom but these through hull transducers have never leaked and I like leaving well enough alone too. Any guidance? Thanks as always!