My understanding is that the 3/4" setback that you gain from the starboard gets the transducer set back into cleaner water as it comes up off the transom. Additionally, though I over drilled and bedded the screws into the epoxy, some folks rough up or create tapered pockets in the starboard, and glue it on using 5200 for example. Either way you can move the transducer around to get the best performance and not put additional holes in the transom.
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