[RavRob]

For those that have managed to get Trakt to tell Kodi which episodes are watched, please could they provide a guide?

This is really unfortunate timing for me as I recently had to transfer my entire data to a new NAS and therefore had to change the sources for Kodi. After rebuilding the library, I used the old version of trakt to tell Kodi which episodes I'd watched only to discover this issue, so I removed the old trakt app and installed Razze's dev version with the six, requests and pytx all enabled and ran trakt dev version but still get the server busy message when syncing TV shows.

Any help would be truly appreciated.

Not sure this is much of a "How to" but myself, I always physically remove all traces of Trakt from my STB. I dont' just uninstall the addon. I am using 2 Windows Machines which makes it quite easy to do. Once all traces are removed, I then re-install from zip a downloaded version of the Dev branch addon.
Before I started removing all traces, I always had problems. This seems to have fixed my problems.