Not always FED; typing this out as I look at the battered tip cap from XR 517 as a result of collision with a resident of Stanford PTA on August 19, 1969. A WTF from up-front and a fine collection of open mouths and wide eyes from the 'professional killers' in the cabin. Made a grapefruit size indentation and a helluva vibration, but undo/replace 16 screws and an hour later we were back on task........paperwork? wot paperwork...