Heres a couple of pics of the transducer Gooped down. I located it between the sailing mast, and the drive well (Hobie Adventure). I figure this area would be fairly stiff. I roughened up the surface with 80 grit aluminum oxide paper, then cleaned it with alcohol.
I was careful to flow the Goop so as not to create any bubbles. Then I placed the puck down in one motion from left to right. I leveled the boat with a pool noodle wedge, and it has stayed put for 3 hours so far.
*Note the "drive well strengthening kit" to the rear of the puck. Its a Hobie thing.
I'll know more next week.