I have an '81 H30. I bought a Garmin gps185 chart plotter with a transom mounted transducer. I was told that(by the sales person) I could mount the transducer inside the hull provided it wasn't cored? I take it that means it is solid fiberglass. I think it is. Has anyone mounted a transom mounted transducer inside the hull and if so, what type of epoxy did you use? Hawaii Dan