The 15 volume set is considered the "bible" in Taekwon-Do. It is General Choi's life's work. We discuss if it's okay to change it and who's even qualified to make adjustments.
If you like what we are doing and want to support us more, check out our extra content, Tul World+. In Tul World+, we create exclusive content about the pattern details and techniques. https://www.juestkd.com/tul-world-plus-moreinfo