So the first picture shows the keel where I am thinking of placing the transducer but there is no flat area there so I would have to create it by either grinding and epoxy or direct epoxy and then buy a flush mount and install there. Don't know if that will affect the water flow to the motor or the boat handling at all so I am asking what do I do. Every video on YouTube is on out-drives. Don't have one but watched it all. Last picture shows the plate I installed that was going to hold the 3D on its left and HDI 50/200..... on the right. I think I rushed into it not realizing the most important thing. No space for the 3D huge one(10") So help please.