so I powderized 20 grams of very nice "purple kush" in coffee grinder.
ran 1 can into 1 dish, and a 2nd can into a 2nd dish.
while the 2nd can didnt look like it was pulling much, I got .45 gram return, and considering I value this at 40$ a gram, thats 20$ of oil from a 6$ can of butane... not...