I did ice bubble hash in sifter bags, used a drill with a mixer. Turned out great, and recommend micro planing when frozen and then puting it in the freezer to dry. Keeping everything cold is key so mesh bags and tools don’t gum up.
I have had success tossing trimmings in a trim bin with dry ice and shaking the trichomes off the flash frozen material. It's easy and can be done right away after harvest.