For those that are interested, I wanted a solution besides dropbox for file syncing on my NAS.
While syncthing doesn’t have binaries for the architecture of the ex4100, I spent some time and got it to compile.
The binary is available here: https://dl.dropboxusercontent.com/u/15524812/syncthing
And if you want to build it for yourself, check out the thread: https://forum.syncthing.net/t/request-for-64k-binaries/5555
Hope it helps someone.
WD: These are the types of apps that should easily be installable, and is what the QNAP and Synology communities are all about. The work has been mostly done here, just pick it up and include it in the next firmware update.
-Dustin