I didn't read everything, but you should check this guy out. I'm not in his speech coaching program or whatever but he has some very good points that resonate with other sources I've read on succeeding in stuttering self-therapy. https://m.youtube.com/watch?v=OBWY69nsBUw Daily practice is key, find what works for you and stick with it until it becomes your second nature. Only then can you tap into the right stuff when stress ramps up and your speech starts collapsing. There are no magic cures and shortcuts.