CM already posted the nug buster prototype and we bought our stainless mesh (bolting cloth) from Howard Wire. HOWARD WIRE CLOTH CO.- Stainless Steel Bolting Cloth, Woven Wire Cloth, Welded Wire Cloth
We broke or gummed up a number of grinder styles before we found the hammer mill to be the most effective, with the garden shredder second.
With the shredder and hammer mill, we were also recovering stems and fan leaves for topicals. Guts, feathers, and all. We even looked at the roots.
9.4.17 Extracting oil from fan leaves and stems - GrayWolf's Lair
I prefer a nug buster for small lots, as it beats the material up less, ruptures fewer leaf cells, and introduces less cell guts into the admix.
I typically break up bragging rights material by hand, which became impractical when we were processing not only our own gardens, but bulk material donated to the cause at outdoor harvest time.
Off the subject, but of note, when we ran stems through the hammer mill, the fibers that were discharged were cashmere soft, albeit in short lengths. Clothes made out of that soft fiber would not only be luxurious, but ostensibly durable.