I have a bass hound 9.4 (2013 Bass Hound 904 Fishing Boat) and I'm looking to mount hb 346 di on it. I can mount the unit in the rear of the boat the plastic it about 1/4 inch thick with some self tappers and marine goop but my issues lay with the transducer. There's a spot to mount on the outside of the transom but it goes in and out of my truck bed and there's a chance of it being damaged, I'd mount it to the trolling motor but I do fish lakes tht are rowboat only. Any suggestions? Thanks