connecting CW-series with E-classic

I have a C90W and a C120W on the boat and want to add 2 E80 classic displays to the network. The CW series will be in charge of the radome and the DSM300, the E-series will display engine data and GPS (using an external GPS antenna). I understand that the CW-series and the E-classics are not compatible but I came up with a potential idea that may work (see diagram). Will it?

  Raymarine boat setup.pdf (Size: 87.55 KB / Downloads: 1)