The Xplane CDI does not appear to take its input from the GTN when doing an RNAV approach. I'm not even sure CDI is getting its deflection from the GTN trainer when ILS is selected but it does deflect - I'm assuming its from the navigation radio on Xplane since it selects the same navigation frequency the Trainer is using. I noticed a small discrepancy between the Xplane CDI and the GTN CDI
On an RNAV approach the graphical CDI on the GTN itself moves correctly but it is not driving the CDI gauge on the aircraft (steam gauge), but it would be nice if the xplane gauge moved.
Also is cross fill suppose to work? I loaded two GTN 750's and they didn't crossfill my flight plan between them.
Other then that, pretty sweet. I really enjoy flying IFR approaches with this simulator. Looking forward to the G500/600 when you have it.