The EasySync.SyncManager.RegisterForSyncing(this, GUID); will return an instance of type SyncedInstanceContainer.
You can use it to re-sync the settings with your code using container.RequestSync() if need be.

You can stop your config from syncing by using EasySync.SyncManager.UnregisterFromSyncing(GUID) but currently that only stops it from syncing automatically on player joins.