PiranhaMax question

[Wonk]

I hit the Ohio river this morning. Looks like I may have lucked out as the FF seems to be working. I still get some funny readings when in less than 3' of water but, being unfamiliar with these things, this may be normal??? It is showing bottom structure very well and fish. I had the sensitivity all the way up and paddeled across some turbulent water at the hydro plants tailwaters. It showed a lot of "clutter" in the water which I assumed was as should be. I just hope now the epoxy holds. Thanks for all the help guys.