I am somewhat pleased with how this turned out. I bought a $20 ammo box from Academy to be the platform. Drilled a few foles and mounted the GPS puck and mount for the 798C Si. The transducer sits inside the box with a worm clamp with a 1/2" nut driver used to mount to the motor.

It's a bit of redneck engineering but should serve me well in a rented jon boat or whatever I decide to get for small water fishing.

You can't keep an Alabama boy down.