i had a helix 10 g4n mdi on the bow with a mega 360 on an ultrex , using a y cable to have 2d and 360 at the same time,
it worked great , I put a 10 g4n msi on the console. never got to put it in the water but looked normal for one running
out if water, Then I added a 5 port and networked the 2 units , put a shoot thru the hull in with a y cable, never tried it in the garage , i tried to get the dash unit to recognize the thru hull but when you try to select it it would blink back and forth really fast and it would change to the map page on it's own , the only 2 d it would show is the one from the trolling motor transducer . I am not sure what to do.