I haven't developed film in about 25 years and it is coming back slowly! I plan to shoot Tri-X or Delta 100 and develop one or two 35mm rolls a weekend with D-76 in a single reel Jobo tank. I have the 1 gal. size package of D-76. Is it better to make up the whole gallon at once or can you mix up a quart and save the rest of the powder for the next batch? Would you prefer to use a quart of working solution for several rolls (over a few weeks) or make up the required amount of a diluted solution and dump the D-76 after each roll? If I were to use a quart of undiluted working solution, how many 24 exp rolls should it develop? Back in my college newspaper days we would take a quart D76, develop 8 to 12 rolls of FP4 in a session and then dump it, so I'm not really sure what to do with smaller quantities. And, I care more about the image I get now. Thanks for your help!