An astromech droid named SC-X2 served Bo Keevil of Ace Squadron. Aboard Keevil's starfighter, Yellow Ace, SC-X2 performed computations to aid in wing reconfigurations. The droid was built with significant reinforcement, enabling it to survive the majority of crashes and malfunctions. For increased grip and directional stability, it moved on a specialized track. Because Bo Keevil was a Kel Dor, SC-X2 contained spare components for his antiox breath mask, as well as other tools, inside its chassis.