Oh I did not realize you had already done work with this technique...that is grea!
Here is a link I found that may have something that compliments what you have learned already...and maybe some new stuff?
https://www.mentalhelp.net/articles/techniques-for-unlearning-old-behaviors-biofeedback-and-neurofeedback/
Keep going with the CBT and ACT...the more tools you have, the better.:)
S.C.