Hrmm... I should restate. Other people had talked about how easily the PF strain pinned in vitro, and thought it might be a mutation. Because other strains pin in the jar, but not as easily.Pinning outside of the jar is the more standard approach really. Stamets for instance never references pinning in the jar, etc. I think it all came from PF. (Although there are the bag techniques where you cut wholes in the bags, and the mushrooms come out of there)