Just moved up to a 598SI and would like to have my 561 on, also. To avoid cross-talking with two ducers in the water (XNT-9-SI-180-T and an XNT-9-20-T), is there a splitter cable so the 561 can use the 20/60 dual cone signal off the XNT-9-SI-180-T? That way the 598 could be full screen SI and the 561 would be Switchfire.