Thanks...but I was able to remove the film back and the film was completely rolled in the cannister. Soeren you stated "The only use you have for the darkslide is when removing the back from the camera. that cannot be done without it in place" I was able to open the back does it mean something is broken? I will back in acoule of days...crossing finger, eyes and toes. Although I am a Mamiya guy at heart, I really like the Bronny as I read it is refered as. BTW, I did not open the back midway and it was 120mm, I finished the roll.