As of now there is no way to make this work according Humminbird (and my experience ) short of upgrading the main unit to a G3N MSI unit if you want to maintain SI and DI.
Type: Posts; User: Zoomfast
As of now there is no way to make this work according Humminbird (and my experience ) short of upgrading the main unit to a G3N MSI unit if you want to maintain SI and DI.
I had exactly the same experience, except in my configuration I connected the XNT 9 HW T to a Helix 7 MDI G3N and shared across the network to 2 Helix G2N MSI/DI units. Left side SI becomes very dark...