Will let you know when he gets back to me! This sounds exciting, started a thread in the Darkroom forum, seems not many people have tried this stuff;

http://www.project-double-x.org/about.html
But it is the look of Double-X that makes it that little bit special and with users exposing it at and beyond its designed exposure index and in various developers, the images it produces are beautifully rich in tones and clarity.

Motion picture films using the Eastman B&W film stock (5222 & 5231) include: Schindler's List (1993), Memento (2000), Kafka (1991), I'm Not There (2007).

The opening black and white scene of the James Bond film, Casino Royale (2006) was shot on Double-X. The English Cinematographer, Phil Méheux, BSC, talked about the scene, in 2006, for the magazine of the American Society of Cinematographers. YouTube have the opening sequence online, a fuller version and the extended original intoduction with the cricket match scene! This was cut in the finished film.