In reply to Lusk:
Yes, temperature and humidity control are more important. For one part, growing from a prepared kit it seems fairly easy but I'm trying to figure out these SIX stages of production which are defined - to start from scratch. In nature it seems to happen reliably - but variably and only once a year of course. It goes something like this:
1) collect right materials and compost them (incl watering and aerating)
2) sterilise the compost (so no competition) and inoculate with spore
3) raise the temp to 20degC for a couple weeks
4) lower temp to 14degC and continue
lots of watering and aerating throughout to get optimal conditions; oh bugger where's the 5th (6th !) stage