Went with azek - I tested screws in a scrap - it’ll do. I drilled (4) oversized holes in transom and filled with thickened epoxy. Tomorrow, I’ll center drill through those holes, polysulfude and mount the azek. Then, install transducer. I’m not afraid of drilling holes as long as I pot ‘em. Should be ‘irie’... saw the 5200 or epoxy / dovetail method and thought if I ever wanted to remove the mount, it might be unpleasant trying to do so...
Getting the transducer set right seems to be a trick. Think I’m leaning toward putting it lower into the oncoming water with the aft downward a tad.
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