I have an idea to relocate a 798 from the bow to the console. And replace it with a 898. I will then have a 998hd SI and a 798hd SI on the console. And my reasoning for that will be the 798 has its own internal antenna. I will have a back up GPS in case my gps puck goes down. I had an incident where my gps wire on my 998 came loose and my gps went down. Unfortunately I had the wire bundle wrapped with some armor flex and didn't catch it until I traced it down. So now back to my original question. I am wanting to run a shoot through Velixar aluminum transducer off of the 798 while running down the lake (because I loose depth with my 998 currently).Then when I slow to an idle I can switch the 798 back to the dual band SI transducer. I will probably run the 798 on the 2d sonar mode. The 998 on navigation and SI Mode. The 898 on the bow will probable get ran on the Di and 2d sonar mode. Does anybody have any experience with what I am trying to do? I the end the 798 will have a switch mounted to go back and fourth between transducers. How complicated is this. Thanks Brian.