I have an HDS 5 with Structure Scan on the bow of my boat. I am thinking of upgrading to a GEN2 HDS 8. I do not want to have to pull new wires if possible. My question is can I use the power cord which is already there from the HDS 5 with the new GEN2? Also can I use the US2 transducer on my Terrova with the GEN2? Thanks for any help!