I've been using Nacco Super 76 recently. I used half (16oz) to mix up a working solution of 1:2 and have developed 4 rolls. So far so good. I figured I'd do the same thing with the remaining 16oz when the time comes. That's the tricky part. The bottle gives its capacity as 10 rolls per working gallon but increase development time by 15% after each 4 rolls processed. The 32oz bottle makes 3/4 gallon working solution, so I guess it's good for 7-8 rolls in all. Right? With each 3/8 gallon, should I increase dev time by 15% after each 2 rolls? I didn't with the last two, but I did the 4th roll at 72 degrees and probably went over the adjusted time (the negs look great). Wait! I did the 3rd roll diluted 1:1. I'm so confused. Relatedly, has anyone used this stuff full strength? It's said to increase contrast, which I'd like to try. Thanks in advance!