What's the main difference between Astia 100 and 100F? I developed a lot of 4x5 sheets in a Jobo drum and FujiHunt Chrome6X kit and Astia 100 was curved, whereas 100F flattened instantly. Basically, Astia 100 sheets retained the semi-circular shape of the Jobo 3010 drum. All expired film, but otherwise no colour cast or any other defects. Anyone else experience this with Astia 100 sheet film?