Umm... i doubt it is mexicana. I currently am working with a true Ps. Mexicana culture that is resisting fruiting and pinning in general. I am also yet to see hope with sclerotia formation. Only time will tell.Los: Follow the instructions in the PF-Tek, and choose if you want to, choose a casing technique from here on the shroomery (optional) or just go straight PF-Tek by pinning right off the cake.
Perhaps you can tell us where you got the culture/spores from? That would clear up if it was indeed a P. Mexicana or a P. Cubensis (var mexican).
peace
camel