I will start doing E6 development at home, but I still have a few questions and considerations that I hope you can help clarifying. For the last three years I have done all b/w film development myself, which I feel confident with. The reasoning behind start doing E6 myself is that I expect that the films will be less scratched during the development compared to have the development done in a lab (at least that is my experience from b/w) and that it will be less expensive for bigger formats (4x5). Also no risk of the film disappears when sending forth and back to the lab. I use a JOBO CPE processor (without a lift) for b/w development and would like to do the same for E6. The E6 films I use are: Kodak Elitechrome 100, 200 and 400 in 135 format Kodak Ektachrome 100 G in 120 and 4x5 format Usually I shoot between 15 and 30 rolls of E6 a year and have therefore bought the Tetenal 1 litre E6 kit based on the assumption that a 5 litre kit will expire before I can use all of it. Can there be found a timer app for development of E6 similar to the massive development app? I think that would be helpful. Is gas expansion during the process a problem if Im going to use my old JOBO 1000 tank that doesnt have the flexible membrane in the lid? Can I use demineralised water as the last rinse step to avoid stains from tap water? Other things, which I should consider before starting? Thanks in advance!