The backing paper on Foma films is thicker than either Ilford or Kodak, I use Fomapan 400 in all of my old cameras, from a baby bessa 66 from 1936 to my rolleis, both a cord and flex, and very many folders and have never had a problem winding, with me it certqainly never gets harder as the film advances, except once on my Ensign 16/20, and that was down to me not loading the film correctly, I did not get it straight, and since I learn't my lesson I have never had a problem with any camera.