Yeah psilocybin has great anti-anxiety effects in the brain, reducing inhibition and self monitoring, and promoting neural plasticity. That’s probably why it helps you. Have you ever tried a macro dose to see if it affects your fluency longer after a trip? I guess you have to be in the right setting and mindset to focus on your stuttering in order for it to be worthwhile trialling how it affects your speech longer term. Like Paul Stamets did by repeating “STOP STUTTERING NOW!” over and over and over again! lol 😂