Any way to crossfill flight plans in dual GTN?

[DZflyer 0]

In my real plane I have dual GTN650s.  When I enter a flight plan in the top device it automatically copies the data to the bottom device (crossfill).  It would be great if that functionality was available in the simulator.  I see the crossfill button on the RXP GTN650 system setup menu, but it is greyed out and not functional.  If anyone knows how to create that functionality in X-plane please let me know.

Otherwise.....RXP, wouldn't that be a nice feature for your next update?

[RXP 2,338]

Hi,

Although we do implement this feature with our GNS simulation, it is not yet implemented for the GTN unfortunately.