I've listen and read about TDCS And the studies say that using this it can go better. There are some studies that confirm this technique. A guy in reddit had done it. [https://www.reddit.com/r/tDCS/comments/99f5bn/my\_experience\_using\_tdcs\_to\_treat\_stuttering/](https://www.reddit.com/r/tDCS/comments/99f5bn/my_experience_using_tdcs_to_treat_stuttering/)