I have in my hands a 1 litre Tetenal Colotec C-41 kit and 7 rolls of film to process through with my Jobo and I have a few quick questions: How do people manage the use of the chemicals? I.E., do you just make 1 litre of stock solution, take from this, process and then return the solution back to the stock bottle to be used again, or do people discard a small amount after each process, which is then topped up with fresh chems (which would mean maintaining two bottles for each solution). The tank on the Jobo has a suggested capacity of 270ml to 570ml. Typically, how much should I be using for processing 2 120 rolls on 1 reel? The literature for the Tetenal kits suggests 16 rolls of up to ISO200 and 12 (I think, or is it 8?) rolls up to ISO400, based on a throughput of 4 rolls per process (I will be doing 2 rolls per process) what are peoples real world experience with throughput? (typically I err well and truly on the side of caution, but with this stuff, I would like to get as much as practical out of a kit) Cheers!