I replace all of the orginal cases (both large and small) with new direct fit air-tites. The reason I replace them is the orginals have a small air hole (both large and small) and they are scratched and dirty from the machines. I am staying with direct fit because of ease of storage and keeping continuity with the rest of my collection. I have a collection of strikes not a collection of capsules so the size of the capsule is of no importance to me.