Over the years, I've done different techniques and what I can tell you is that talking with your hands only helps for a period of time. It's like building up a tolerance to something. First you start using your hands to speak, but as that becomes more normal and familiar, you start to stutter while talking with your hands. Then, you start stomping your foot slightly to get the words out, and the cycle continues. Vivian Sisskin, who's a respected speech pathologist at the University of Maryland, recommends that stutterers get away from these techniques, and although I have relapses sometimes in especially important conversations, I can say it's probably done more harm than good for me socially to stop using such mechanisms. What you do is completely up to you though, I was skeptical at first.