I've been making my GD for a while now with great success. I have since refined my method to include the following for even greater potency/extraction using the same ingredients & measurements (my experience only, others may vary). The difference in method veers off into the following: Coffee grind 1/8th and freeze for a few weeks, shaking jar every day (this, i think helps to isolate the trichome resins and loosen them for better alcohol extraction); I also freeze my 190 Everclear for the same period of time (not that time makes a freezing difference - once it reaches temp, it's there); then, I combine the two and shake very vigorously for about a minute and place back in freezer. Keep mixture in freezer for two more weeks and shake vigorously 2x daily. Then, after two weeks place in fridge for another week. I have noticed that the cloudy white layer that forms in the solution (between herb at bottom & EC at top) using this method is denser and in greater amount than in standard method. Then, I proceed with the standard GD procedures and bottle. Tastes great to me (though I'm not particular about the taste like a lot of folks are), and it is potent as all get out!!! 1ml. on a light stomach is really all I need - potent for a full 8-10 hrs. 2 ml. (1 ml. more, 90 minutes after the first 1 ml. kicks in with a lasting punch that is really too much for me, and goes full throttle for a full 24 hours - I wake up still reeling)! Herb used is top notch Sour Diesel. So that's it, my experience with two methods. Don't really know why the freeze methods works SO well, but for me it really does!