I have helix 10 mega si g2n and a helix 10 chrip gps g3n units mounted on the dash. The g3n is connected to a new dual band thru hull ducer for high speed and the units are networked through a 5 port switch. A couple of questions. As both the thru hull 2d and mega si ducer are stern mounted and very close to one anouther, will they interfere? I am getting almost no di return but si is fine.. will a y connector resolve this issue? When i use the new in hull transducer on the mega si unit for 2d via the network i get a boat load of vertical line interference on the 2d and di screens.