Got a buddy wanting to add a new 1198 with his 798. He wants to get rid of the 798 transducer and run them both off the 1198 transducer that will come with the unit. I dont have a clue as I run an 858di and 898 with interlink. He is a cat guy and want will be mounting both off the transom for drift fishing. Wants to have the SI running on one and the DI on the other? Is this even possible with ethernet? If so what cables/splitters will he need. Wants me to help install. To me it would be lots simpler to just run both transducers but oh well.