I've heard recently scientists used an espresso machine to extract cannabis.. From what I can gather they added propanol to the plant material and then used the espresso machine to extract the active compounds.. I wonder if there is any way to extract cannabinoids and terpenes without adding the propanol and also if there are any usable applications of steam extraction in a configuration like that of an espresso machine where the steam can exit the bottom of the extraction chamber (vs normal steam distillation) and if this could allow the heavier cannabinoids to be extracted with the steam..