I'm curious to know whether or not the copilot knows his B-17 is being restored. It would also be interesting to hear what he remembers about the airplane. Would be good to document this before he passes on as it would add to the history of the airplane.
How long ago did you speak with him? Do you have any contact infromation or know where he is living? I'd like to take a crack at locating him and get his story about flying the airplane before its too late.