Trebble was an individual who was a subscriber to, and commenter on, Cynabar's Droid Datalog. Trebble heard that the Tombat used an RA-7 protocol droid to map the layout of a manor house by upgrading the droid with a holocamera and automap.[1]
Sources[]
"Cynabar's Droid Datalog" — Star Wars Adventure Journal 14 (First mentioned)