Spores are legit when you wana spawn straight to substrate like with PFtek, but in the case of going for monotubs and bins you can clean up LC on agar too, no need to get spores for that. So the same syringe you get for the PF tek, you take that and drop one drop on a plate of agar. will have different colonies pop up, you wait for the strongest one and transfer to new agar dish. repeat this process till you have even growth that indicates something close to monoculture where there's little competition to thrive, they're your strongest and most prolific. take that agar, put it on bulk grains, use the bulk grains to spawn to bulk substrate and there you go. monotubs for daaaaaaayyys.
you can also take the grain master culture and put it onto more grains, doubling, trippling even quadrupling your culture.
also when you have a clean agar plate, it's easy to make 10 good agar plates from that one ans say you end up with another 5 master cultures you can go ahead and transfer 10 of each of those and you'll have between 40 and 50 plates of master culture.
from there you just go crazy and dump psilocybe mycelium all over the place and wait for the magic to follow you