Please help with a potential problem. I have a stick steer boat with a HDS-7 GEN 2 e/w GPS on front of boat. I have transducers on each end of the boat and switch to toggle back and forth. If I wanted to mount a Garmin ECHO 550c on the left side and could come up with a mount for the transducer to hang over the side of the boat,will I get electrical interference should the cone angles overlap???? BTW I like my Lowrance HDS-7 after using it and getting comfortable with the menues, very different from my Lowrance 510c. Thanks for any suggestions.