I just read the kodak processing instructions for the XTOL developer and that leaves me with two questions: 1.) The docs state the following: Now I have mixed one canister with 5 litres of XTOL. After I developed a single film I will put the used developer from the tank back into the canister. With this procedure am I assuming correctly that I will have to discard the developer after 75 rolls of film and increase development time by 15% after 25? 2.) Furthermore the docs say that the tank should be first filled with the developer and then, in complete darkness, the reel should be loaded into the tank. (No pre-rinse is mentioned). Is this really the desired process? I always thought one loads the tank with the reel closes it an then pour the developer into the tank (optinally pre rinse it).