I might be wrong about this, someone correct me if I am. But I think a hammer mill is used both for making regular grind, and micronized. For micronized you need to crank it up, or let it run longer or something (I'm not actually too clear on how hammer mills work). If you don't remove the makas, you would need to either cool the hammer mill, or inject a nitrogen atmosphere to prevent combustion. (Kava King has a patent on the latter process, although I'm not sure how much water that patent would hold in court, due to it being kind of an "obvious" invention. Also, it's a US patent, so I don't know if it would apply in Fiji--I am not a lawyer)