Interesting, I've never thought of running syncthing behind koreader. Do you use any particular plugin like [this](https://github.com/jasonchoimtt/koreader-syncthing)?

How do you configure wifi connectivity in koreader to make this useful? koreader seems to prefer keeping wifi off unless you do an action that needs the internet. Do you leave wifi on, or just periodically turn it on manually to sync?