Thanks for the suggestion. If I shoot a test roll of a white or grey card, road ruts are apparent as well as negative desities coming into the frame from the sprocket holes. We've tried 1500 series and 2500 series drums and reels, varied the rotation from 60 to 24 rpm, with and w/o presoak, distilled and filtered tap water for chemistry and presoak, added some bromide to the mic-x and nothing gets rid of the problem.(posted 8162 days ago)Jobo is sending me a couple of their steel reels to test with to see if that helps, but given the lack of results so far, I don't hold much hope for that and need to have my contigency plan (deep tanks) in place. Eric Nelson