I can't speak to any particular tek, but the more pulverized something is, the better for extractions or at the very least faster and more efficient.
I also have some experience destroying two electric coffee grinders with MHRB. The first one was destroyed by putting large chunks of MHRB straight in. The second one survived a bit longer because I utilized a traditional blender to break up the large pieces into a sort of fine shredded mulch before chopping it up finer in the coffee grinder. It did survive long enough to help pulverize 250g MHRB.
I think something like this might be appropriate for grinding MHRB;
