@mzel: Can't symlink, it's FAT32. I don't quite remember where Dropbox is sync'ed to, but if it's inside .kobo, we, err, blacklist that regardless of showing hidden files or not ^^.
I'll double-check on the Forma, because the stock Dropbox sync'ing is so meh' that I'll admit I hadn't thought of that when implementing the blacklist (the main goal was preventing getting lost in there, because DRM & thumbnails & nickel settings).
@jbenwell: The OCP ships
example configs for switching to a plain NM setup.