Pegasus smaller ship than Zephyr and cheaper yet had 3 item spot, Normal, bigger ship should had more number of spot. Even Great Eastern had 8 cargo and 3 item spot. Would it's make sense to had Zephyr had 3 or 4 item spot since upkeep is higher and long time to build Zephyr, I think it's is highest upkeep of all kind of ships yet only mere 2 item spot.