Did the last flight of a classic British Bomber a few years ago. It was then taken apart by BWoS to see how it was faring with regards to the projected fatigue life. When the leading edge was removed, a large and interesting tool was found. It appeared to be a 'long distance rivetter' fabricated from a standard rivetter with 6 foot long poles welded to the handles. It bore the aircraft manufacturer's logo and had been left in there for the whole of the aircraft's life, and weighed about 12 pounds!