gThe only thing I can think of, and I have been using Fomapan film for around the last 15 years as my main film, is that somehow you have got hold of some of the older Fomapan film, I have not seen curl in either 200 or 400 Fomapan for at least 7 years, maybe more, even before they changed the film base from the blue to the present base, if it is any help then all I do is develop,plain water stop,fix wash, wetting agent, shake then hang up to dry with a bulldog clip to weight it on the bottom, from a line in the darkroom, it curls very slightly at the bottom, but very slight, a day under weight and it is flat as a pancake, With the older fomapan I would have agreed with you, it was terrible, had a job to get it into a file sheet, but these days no problem, I filed some today,120, no problem, took me 2 minutes, beyond that I have no idea what your problem is, but Foma makes lovely film, like something from the fifties, the 400 reminds of the very first Tri X film,