I've been developing (120) B&W film for a number of years now without any problems. I've been using plastic self-loading spirals, and like many people had mixed luck getting the film on them. A couple of weeks back, despite doing my usual trick of waving the hair-drier over the spiral before loading, I ended up fighting a great battle with the film to get it loaded, the end result was a number of damaged frames due to creases and mechanical damage. Having had enough of the self-loading variety I got myself a Hewes 120 stainless spiral to give that a try. A couple of practices in daylight seemed to suggest it was straightforward, and sure enough, the first film loaded with no hassle at all! . Unfortunately after I'd developed the film and opened the tank I was slightly disappointed to find the film had come off the spiral and was rattling around between the spiral and the tank (the end of the film was still clipped to the centre though). Although the film had been developed fairly evenly there was a narrow strip at the extreme edge which appeared slightly different, but the main problem was mechanical damage to the film Having just finished off another roll of film today I set to and tried again. I was particularly careful to ensure the film was centred properly under the clip, and once again the film wound on easily. This time to try and ensure the loose end of the film didn't drift out of the spiral I peeled the tape from the end of the film and placed it from the end of the film over the side of the spiral to secure the film in place. During the processing (TMY2 in Rodinal 1:50, 5 inversions every minute) I wasn't quite so aggressive with the inversions in case that is what contributed to the film coming out previously. Even so, the developer got a good slosh from one end of the tank to the other. After finishing this time I was pleased to find the film remained on the spiral, but slightly disappointed to find a dirty great chunk of each exposure was under developed! Of course I didn't find this out until after I'd removed the film from the spiral, so I don't know whether it was the top or bottom of the film which has been affected, or precisely how it was sitting on the spiral. :confused: I've filled the tank with water to confirm the volume of chemicals I normally use still comes to just over the top of the empty stainless spiral - so I know the film was fully immersed in developer. Although I didn't inspect the film on the reel closely before taking it off, there weren't any obvious problems in that regard. This is now the second film where there have been development problems, and the only difference between these films and all my previous trouble-free occasions is the use of a stainless reel! Do stainless reels need noticeably more agitation than plastic? Are there any other clues as to what has gone wrong before I process another 'test' film? Regards, Ian.