I swapped out the 650 for the 650Xi and that went quite easily.  All the setup was already in there when I powered it up, so I didn't need to change anything.

I also got around to creating a checklist file for the G3X.  You can download a copy of mine here.  The Garmin Checklist Editor can be downloaded from here.

Easy swap!  Now to sell the 650 on eBay...

Installed the latest databases and it's all set to go!

How the checklist looks on the G3X.  Nice!  The .ace checklist file always needs to be at the top of the inserted SD card.  It doesn't copy the file internally, so it has to be there.