Well since you asked, this is how I do it. I got a good amount of herb, took out as much stems as I could (I went cheap so there was a lot), then I ground it up until it was basically dust. I put it in the freezer for about twenty minutes, then I put it in a pouch made out of wax paper and crushed it with a vice. This seems to be the most effective method for the pressure approach since it's very direct and even if you have the right vice. I've tried putting it under the end of a 4X4 and hitting it on the other end and running it over with a car several times (TPB af) and both have worked well, but not as well as the vice. After it goes through the vice each time, I break up all the pieces that are getting more and more compacted together and toss it back into the freezer. I added a tiny drop of water into the mix on the second and seventh times I tossed it back in the freezer and repeated until it turned black.
It looks like this
I was wondering if anyone here knew of any better DIY ways to make it or if I was majorly ****ing up along my process. Stuff seems to have come out excellently though, about 10X better than the original product (which again, was utter crap).