I really advise against using any techniques when speaking. They may form a habit, a tick almost. I have achieved a "Worry-Free" stutter after 2 years of practicing at home and improving my self-esteem as a whole. It really helped and now my stutter is almost unnoticeable to the casual listener. I did it without any techniques, I just talk normally. DM me if anyone is interested in how I managed to do it. I would love to help.