Thank you for sharing your story. I am also in the process of experimenting with psilocybin to try and increase my fluency. I only been on a few trips as of now, but I can actually feel a difference. I don't know if it's an actual change in my brain, or just the experience itself that helps my fluency. But that's not really important to me, as all that matters is that I become more fluent. It has taught me to speak with a purpose, which I feel helps with getting my words out. You are much older than me though, as I am only 19. I have not done any heavy trips yet, but as of now, I don't actually feel like the dosage has any difference on the effects. Just the trip itself can help. I am looking forward to the long-term effects of psilocybin on my stutter, but right now it's looking good.