NMEA 0183 to 2000 Conversion & Axiom

I want to add an Actisense NGW-1-ISO to my existing system.

My existing system consists of three E-120 classic MFDs and has both a NMEA 0183 bus and a NMEA 2000 bus.
Display #1 (Master) connections are: 1) NMEA 0183 connection-input (muxed signals from GPS, Heading Sensor, and Auto Pilot) and output to NMEA 0183 bus "listeners" (ACR locator beacon (GPS and Time); iCom VHF radio (GPS and time)) ; 2) Pathfinder Radar connection; 3) Seatalk2 connection from NMEA 2000 bus (Trim Tab Sensors and Weather Station); 4) Seatalk HS connection to Seatalk HS Network Switch (SR-100; DSM-300; E-120 MFDs x2 repeater units); 5) Video Camera inputs and 6) VGA output to a VGA monitor in the main salon.
Display #2 (Repeater) connections are: 1) NMEA 0183 AIS input from Raymarine AIS-650; 2) Seatalk HS connection to Seatalk HS Network Switch.
Display #3 (Repeater) connections are: 1) Seatalk HS connection to Seatalk HS Network Switch.

Questions:
Are there any issues with added the NGW-1 to the NMEA 0183 muxed signals (Display #1; Connection #1)?

Assuming there are no issues, could I then reconfigure the NMEA 0183 input on display #1 to receive the AIS-650 and continue to use the output wire pair for the "listeners" on the NMEA 0183 bus?

If this all works, at some future date I would add a stand-alone AXIOM 12 with 3D Realvision after the thru hull sender becomes available. I would then like to connect the AXIOM to the NMEA 2000 bus so it has all of the other E-120 "non-graphical" data. Will that work?

Thanks,
Jon Spain