About film changing bags... while I use one all the time for loading 35mm film onto reels, I was having a hell of a time with 120 until I discovered that the heat and perspiration from my hands was making the film slightly sticky, and that combined with the film being less stiff because it's wider made it impossible for me to consistently get it onto the plastic reels I was using.(posted 8507 days ago)Once I started loading film onto reels in a completely dark room without a changing bag, 120 was no longer a problem for me.