I've tried just to copy LocalState folder from one tablet to another and because I use same location/path on both tablets for MS files, just by copying those files into MobileSheets folder (in C:\Users\<yourusername>\AppData\Local\Packages\) I was able to load everything in few seconds. Everything seems to be just same on both tablets. If it's not secret, are all files needed for this manual synchronization in this folder Mike? If so, I might just create auto-backup of this folder to my OneDrive folder, that also has all files I need for my MS, and this way I can make one-way sync any time I need...
Tablet: Surface Pro 8,
Other: Strich BT-FP2, USB-MIDI connection to Kurzweil Forte 7