Got the 530W/430W combination working in the default C172.

It is really great! 
Most noticable differences with the Xplane version of the 530/430:

• All menu screens are there.
• In turns the CDI guides you through the turn as well as expected and it should. That in contrary to the XPlane 530/CDI which flips the needle instead.
  (see also https://pplir.org/pbn_manual/ page 8 of version 3 rev 11)
• OBS fully works with the CDI1 and CDI2 (OBS course set by VOR1 and VOR2 indicator dial when in GPS mode)

 

Small footnote: It is a bit of hassle to get it working in the default C172:

• Do not change the name of the directory from where you install it (standard C:|RealityXP), otherwise licences will not be installed correctly
• Get the setup for the default 172 as
  • GNS 530 1
    • Master Device
    • Connect GPS to Autopilot
    • NOT Connect GPS to HSI
    • Connect to VOR1/OBS (course in)
    • Connect GPS to VOR1 indicator
    • Connect CDI Mode to NAV/GPS Switch
    • Sync mode: Select both directions
    • Use Simulator GPS Commands
  • GNS 430 2
    • NOT Master Device
    • NOT Connect GPS to Autopilot
    • NOT Connect GPS to HSI
    • Connect to VOR2/OBS (course in)
    • Connect GPS to VOR2 indicator
    • NOT Connect CDI Mode to NAV/GPS Switch
    • Use Simulator GPS Commands
• Follow the last two pages of the manual, then make sure not to use "Paint 3D", but "Paint"
• When you have a paid nav subsibscription available for a  real device, update the database of the Garmin GPS simulator.

 

Additioanlly for the default 172 set the Power Source for

• GNS 530 1: Avionics Bus
• GNS 420 2: Auto (Bus #2)

Then you can use the two avionics switches to switch on/off each of them individually.

 

A remark about my satisfaction:
I can only be that satisfed because I have access to monthly updates of the database for a real device.
Otherwise the standard provided database would have been far too much out of date (2010) as in recent years in the areas I fly the number of RNAV / RNP / GPS procedures/approaches increased a lot and NDBs and even VORs are taken out of service. If you like to fly based on real or Navigraph charts you will need a fairly recent database for the 530/430.

For those wondering why I am that enthousiastic about having full OBS capabilities based on the VOR1 and VOR2 indicator dials: It is a great tool for:

• IFR circling procedures (if OBS available, mandatory to use by my instructor/examinor)
• IFR Holdings
• VFR runway and airport reference as backup for bad weather conditions, and/or difficult to find airports visually