Tomcat, I put my X-85 at the bow. It still runs like new. It's the best unit I've ever had. The new unit at the back is an LCX-25C. It has 8,000 watts so it's not lacking in power. Here is a screen shot from last Tuesday night. It was zoomed right out and the sensitivity was at its minimum. You can see that there are 4-5 fish on the bottom. I happen to know that they were saugers but this is what it looked like.
ps. Had I zoomed in to the bottom, I would have picked up those fish clearly.