Bob:(posted 8231 days ago)I used one for a while and had problems. I could fill or dump in about 20 seconds so that was no problem, but I oftentimes got streaks that appeared to occur because of uneven coverage during the fill. I had a problem with excess density along the edge of the film toward the center of the reel. The film would get squeezed against the central sprirals by the retaining band causing a longitudinal streak of extra density where the film emulsion contacted the spiral. I quit using it and switched back to my old, early-model Jobo that uses twice as much chemistry but doesn't damage the negs. Let us know if you manage to figure out how to use it successfully.