I use a JOBO ATL-2300 at home. I have had problems in getting good results from processing C-41 and E-6, especially E-6. Until recently I realized what the problem is. I don't know if I should blame Kodak or Jobo. I use exclusively Kodak chemicals. The tank I use is a 1540 tank, which takes 4 1501 Jobo reels for up to 8 35mm 36 exposure roll of films, or using only 2 1501 reels and load with 2 220 rolls of film. There is no problem in loading so may films into the tank. The problem is it takes 470ml of chemical only. And Jobo never mentioned that this is actually too little chemical for so many films. Last Summer I kept having poor results from the whole 5 liters of Kodak one shot 5 liter E-6 kit. I followed Jobo's technical bulletin to make processing adjustments with no much improvement. I kept on processing 2 220 rolls in one tank at a time. And I could never get my Velvia done right. Yesterday I started out with a new fresh kit again. The Kodak box contains no instruction sheet whatsoever, except mixing information and processing times for the steps. Eventually I spent quite some time looking into Kodak web site for information about the capacity of the kit. I finally dug out words like: 20 rolls of 35mm 36 exposure total... My god! the way I used the Jobo 1540 tank system has been like 20 rolls of 220. Yes, 2 rolls per tank and 470cc each. The 5 liter kit has done 20 220 rolls for me. No wonder the result was always poor. I always got the films too dark and too constrasty. Colors were never as vivid and saturated as I hoped. I went to Jobo site and looked up Jobo tank system information. Sure it emphasizes the capability to process that many rolls of films in one tank run. Never do they mention only if your chemical has the strength to do it. Should I blame Jobo? I am not sure. May be I should blame Kodak's kit that is designed to only process a handful of rolls and you should buy another one if you want to process more. According to Kodak info the 5 liter E-6 kit was designed specifically for rotary processors. Although it does not mention Jobo but I think it doesn't take a photography expert to know that the most popular rotary processors are Jobo brand named. I wonder how come the kit is made with only half of the strength it needs to be. I have always assumed that it is made to fit the processor. Maybe I am wrong. Does anyone experience the samething? Or am I having actually other problems? I now process only one 220 rolls leaving half of the tank empty and feed the tank with same 470ml of chemical. The result is just nothing but good! After processing 2 rolls with 1000ml chemical I tried to process another short 120 roll and reuse the 1000ml chemical. The result immediately showed the same problems I always had before. The Kodak kit is just barely having the strength to process one shot a half tank full of film in a Jobo 1540. The ATL-2300 is a huge and superior processor in my opinion. But sadly I can use half of its capacity with Kodak E-6 kit that is designed for such a processor.