I will be installing a new transom mount transducer on top of a pieces of starboard per Bob and others recommandation, I would still like to mechanically attach the starboard to the boat. I know from when I installed my kicker bracket that the transom is not core all the way across and was able to mount it into the none core area. It was easy to find the transition between the thicker cored area and the thinner solid fiberglass area on each side of transom but there is no apparent transition on the bottom. Any one know if the transom is core all the way down (2006 CD22 with removable cockpit floor board).