So, having spent a few hours searching the G3X install manual and searching online, I am still unsure about what capabilities the system has. I would like a minimalist panel and the original plan was to install just the GTN 625 for GPS but since legal IFR requires a backup navigation source, it looks like I'll be ordering the 650 instead. What I cannot tell is whether or not I can utilize the GTR 20 as the remote intercom/audio panel & com 1 radio while also including the GTN 650 as an additional com radio without needing to run it through an external panel like the GMA 240. None of the installation drawings show this combination, but has anyone out there successfully done this? Can I just run the GTN through the GAD 29 and the GDU460 and designate it com 2 while putting the GTR 20 on the CAN bus?