Gotcha , thank you. I have a tough enough time watching my bait and the troliing motor waiting to eat it up. I like the 858 Di for the bigger screen 2D switchfire, splitscreen to DI so I can identify the structure I am fishing. I thought I would skip the upcharge on the SI for the front I woud think the imagery would be compromised when moving the trolling motor. I had also read that the trolling motor mount and the Si is a bit more tedious, although I know all the pros use it. So the 788ci from 2007 is going to get upgraded to the 858 DI and a ram mount so I can save my neck. Not that I don't love my 788, its my first.