I'm using the Kodak E-6 kit and reading their literature. Maybe I am over-analyzing things but I'd like to be sure before I run my first batch in a 4-roll tank. The guide says: "For best sensitometric results, use no less than 250 mL of each solution per square foot of film (235 mL for two 135-36 rolls)." That implies that I can run 4 rolls of 120 film (same as 135-36 in sq ft) on 500ml of solution. However, the kit literature then indicates that, in batch mode, after 20 rolls, processing times need to be increased: "Approximately 10 to 12 square feet of film (about twenty 135-36 rolls) can be processed through a 5-litre sink line using this chemistry in a batch mode. After this much film has been processed, you can increase your first developer time by 20 to 30 seconds and your bleach time from 6 to 10 minutes to process another 5 to 6 square feet of film (about ten 135-36 rolls) with satisfactory sensitometric results. Processing more film will require even longer first developer times and will result in high contrast images. This may be acceptable for some appplications (e.g. graphics / text presentations), but not for general photographic images. In any case, do not process more than a total of fifty 135-36 rolls in a 5-litre mix of this chemistry." So, do I, or don't I? Can I do 4 rolls using 500ml as a one-time use without adjusting from standard development times?