So I just put two Gen 3’s on the console. Have a Gen 2 up front with a point one on the NMEA network. Before I had two Gen 2’s and only front one on the NMEA but had a yellow cord to share waypoints. Only want the point one on the front unit. So I set everything to local and my back left unit will not find the structure or depth that’s plugged into the right unit or find the front unit. None of them recognize the other units. The waypoints are sharing and working but that’s all it will share. Before with two units I could still see the structure on the front unit and control with only the yellow wire and NMEA only up front. Now that there’s three units do you have to have NMEA connected to all three? Do they all need to be on global? Any suggestions?