I was reseaching the interlink option as a possible add on to my boat. A few questions came to mind. First, I have a 797 sideimage unit at the console and looking to pair it with a unit for the trolling motor. What unit would you recommend as a good twin to the 797? Second, how easy is this to set up with an interlink? Third, where do you place/mount the interlink? Im new to interlink...but i can see the benefits big time. Problem is getting from point A (how to go about it) to point B (on the water using it).