I can't quite tell from this thread: Have you only ever experienced reduced stutter from speaking slowly _whilst alone_? You see, stutter tends to vary a lot depending on context, and it's rather common to not stutter when you're on your own (because you're not actually communicating with anyone). Usually, speaking slower won't automatically mean you can reliably stutter less (or not stutter at all). This is just to say: Don't set your expectations too high, because you may not be able to control your stutter to the extent you desire. Have you ever been to speech therapy? Maybe you can get some help getting better at managing your stutter.