Does anyone with a 898 get good down imaging pictures? My DI shows little to almost nothing. I keep seeing the nice DI pictures you guys post and can't get anything outta mine. Is there a certain way you guys have it set? I plan on getting a DI only unit for the front of my boat, but would like to use DI at the console when I'm searching. Any suggestions would be greatly appreciated! BTW, last time I was out, I kept getting a bunch of vertical white lines on my DI views. Why would that happen? Batteries were charged and my SI and 2D views were fine.