I'm all up for giving this a shot so I can undo SU.
The only thing is, is that I have no clue what a terminal is or how to use one. It does look like this can be done via Odin.
PLEASE KEEP IN MIND THIS IS FOR STOCK TW ROOT ONLY. Anything else will trip knox.
So what do you think? Personally (if this works) I think this is a great way to achieve Root and use root apps.