New Element9 MFD planned with older ST(1) equipment

[brausto]

hello, I'm new in this forum and I see great support here!

My SY was built in 2005 with all RM nav-electronic installed since then:
Plotter RL70RC
ST60 Wind
ST60Tridata
AP smartpilot (S2 ?? don't know exactly, but not SPX)
smart pilot wireless controller with handheld
AIS 250
3rd party DSC marine-radio

My plan:
The plotter needs to be replaced.
So the new shall be Element 92 which has a NMEA2000 Micro-C connector.
I plan to change over to STng network and connect the Element9s via STng to NMEA2000 spurcable.
ST60 instruments and remote smartcontroller shall be connected via ST to STng converter as shown in the picture (PDF).
Autopilot shall be connected via the 4800Bd-NMEA0183 port of the AIS250 , which converts to 38400Bd-NMEA0183. This AIS decice has a NMEA Mux implemented. So the autopilot data gets to and from the STng via 38400Bd-NMEA0183 and 3rd party YachtDevices YDNG-03R or equivalent. The second device on the 4800 Bd-NMEA0183 out-port shall be the position information for the DSC-radio.


* note to the autopilot connection : I read the forum and found the information, that legacy autopilots like mine could be connected via ST to STNG converter with full functionality since SW update 1.11 (update of the ST to STng converter) in august 2016 - which connection works better ? NMEA0183 via AIS and YDNG-03 or via the ST to STng converter ?

Q1: is the planned system functional ?
Q2: any recommendations ?
Q3: will it be possible, to use the autopilot page of the Element 9s to control the AP ?

Please let me know, if my plan is ok or do you see any obstacles to clarify ?

Thank you and greets from Germany !
brausto