Does this network diagram make sense

Here is my current network diagram. I am considering adding an autopilot and a second plotter or PC running Maxsea.

I want to show Maxsea what I have so that they can provide input on how to integrate their software.

Should I convert the heading output of the PG500 to NMEA2000 for the 711C/OB autopilot? Or utilize the GH2183 which already is on the network?

Howard

Only issue I notice is the lack of NMEA mag variation being given to the PG500 so it can be placed into TRUE mode to make the FA150 AIS happy for heading.