At some point prior to the Galactic Civil War, they were ordered by a townsman named Vuldo to build illegal blasters, but the droids questioned his intentions. Vuldo responded by shooting U-E with a blaster.
Q-E and 2-E then received help from C-3PO, R2-D2, and Nak Pitareeze and managed to expose Vuldo's scheme, and also save U-E since they had managed to salvage his cogitative theory unit and memory banks beforehand and thus, R2-D2 was able to install them on the body of a labor droid that had been constructed by Nak.
- Star Wars Droids: The Kalarba Adventures 5 (First appearance)
- "Straight from the Horse's Mouth"—Star Wars Insider 25 (Picture only)
- The Essential Guide to Droids
- The Complete Star Wars Encyclopedia