Greetings from Croatia! After almost a year that I was giving my negatives to a studio for development, I acquired what I needed for home processing. My First BW neg that was developed entirely by my hand. What a thrill and joy. But I made few mistakes. Some I recognized and fixed and for some I need your help. I got this vertical darker lines, uneven development, only on images that were in the middle of the film (in the middle of the tank too). Images on the edges were without lines. It is not a camera error. My development process: I have an old non-invertable plastic tank with a reel, Universal Laik. The film is a Fomapan 100/120. The chemicals are Fomadon LQN and Fomafix. 1. 20ºC 8 min sliding on table every 30 sec./ 5X, but as I was excited it is possible that it was with shorter intervals. Could it be that here is an error that made those vertical lines? 2. water + white vinegar 1:10 one wash 3. Fixer 1:5/ 3 min (I made mistake here. Mixture was colder than I thought, so my time was too short. I've got a milky film and I refixed it for 1min and it was fine then. 4. Wash water + few drops of dishwashing liquid, couple of times.