SM's system works for SM because there's the Xray visor and grapple hook as well. If you're going to have a cycling inventory, you might as well put missiles in there as well. It would be stupid to put a cycling inventory in ZM that would just have missiles and super missiles.
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_foolmo_
'Oh please, if foolmo made that analogy you'd think it was picture perfect'
- Biolizard28