Adam and Bancopuma, you guys might want to try a small run with ice cold ethanol (pure grain alcohol) as high a proof as you can find in order to make an absolute extract. The trick is to use ice cold ethanol that is at least 151 proof or higher, I try to use the 196 proof stuff from Everclear or Rectified Spirit or Spirytus from Poland. Take all of your plant material and place it into glass jars and into your freezer, as cold as you can get it. Place your pure grain alcohol (ethanol) into the freezer as well and all of your filtration equipment. After 2 days in the freezer it should be cold enough to work with. Pour the ethanol over your plant material enough to cover it and agitate it for about 3 minutes, then pour the liquid off and keep the plant material in the same glass jar and repeat once with the same amount of ethanol.  Two times should be enough to get 80-90% of the goodies out.  Because the ethanol is ice cold and is not in contact with the plant material for very long it will not leach out the Chlorophyl and many plant fats and waxes that ethanol normally grabs at room temp or higher temps. This is good, you do not want these in your end product.  What is has grabbed is full spectrum cannibinoids and terpenes, THC and CBD which you do want. Combine and filter this yellowish liquid, then pour it into a flat bottom glass baking dish and allow all the liquid to evaporate.  What you will be left with is absolute extract of cannabis that is either a shatter glass consistency or a very thick oil. Scrape this up with a clean razor blade and place it into a small glass jar or container that you can pull a vacuum on and you have wonderful full spectrum absolute cannabis extract that is food grade. You can dissolve some of this extract into a small amount of ethanol for tinctures or green dragon if you wish, or vape it as is. This stuff is much better than BHO or Co2 extracts and far better than any hash I have ever had, IMHO. Good luck.