Hi. I have just received my new boat with 2 x 9” EVO 3S MFDs networked via NMEA 2K. I have the 3/1 Ducer and TM275LHW Ducer installed. My plan is to eventually head out offshore, but for now just learning how to use the setup in PPB. What chirp range is best for PPB with the 275 Ducer? How to ensure I have defined properly both ducers on the networked setup? I have horizontal lines showing up on the MFD for the 275 Ducer screen when at rest but ok when underway. Possible causes of this? Cameron