The Piper L-4 Grasshopper—the military adaptation of the beloved J-3 Cub—served as an agile forward-observer and courier during World War II. American Aero Services rejuvenated this feather-weight liaison plane by re-doping its fabric covering, refreshing the Continental 65 hp powerplant, and re-creating its original olive-drab markings. The result is a lively “spotter” that once again shows off the nimble charm that made the L-4 indispensable on short, unimproved fields.