The Hummingbird is a converted Slug Transport. It features the same narrow nose as the Slug to allow it to dock at the narrow entrance to high security docking bays. However it has several modifications that make it better suited to long duration missions between resupply stops.
One of the modules has been replaced with an oxygen garden to keep the ship supplied with atmosphere on long voyages. To compensate for the lost storage space, one of the reverse LK Core engines has been replaced with a cargo bay.
The rear drive section has undergone modifications as well. An additional hub was added between the rear engines and the cargo section to provide additional attachment points. To maintain the ease of construction, the engines were push out to the sides to avoid needing to cut away some of the structure of the generator to fit them. On the starboard side a refuel silo was added to allow the Hummingbird to operate for long periods of time without requiring resupply. On the port side, a solar panel was added to help with the additional electrical load from the oxygen garden.