I could post my compiled jar but my hope is one of the maintaiers of kmttg will merge this change and then release a new version.
I really like this idea. I wrote a small patch to add this as a feature to the cli args.
It would be helpful to add a check and display a user friendly message about the lack of javafax. I've attached a patch that does just that. If you think it would be of use I could also look at refactoring config.java so headless opperations can work without javafx.