Coffee Grinder / capsule cutter

In countries like mine, where separate waste collection is mandatory, used coffee capsules cannot be disposed of as they are but must at least be emptied by separating the powder from the casing.The Nescafé Dolce Gusto capsules remain sealed even after use and to remove the powder the simplest way is to cut them with a knife, but this is not a very safe system. I have designed various tools to open the capsules, improving them each time until arriving at what I believe to be the least dangerous system: the one which does not allow any contact between the blade and the human during use.This model is made like a small coffee grinder and when cutting the capsule it is impossible to touch the blades. Drawer assemblyMount the front panel on the capsule holder body (glue it if necessary);Insert the hook into the slot;Insert the knob all the way into the hole, aligning the rectangular notch of the hook with that of the knob;Make sure that the knob rotates freely, if not, check the alignment o