I found a strange and wonderful combination for MACO UP 100+: 4 minutes in FX-2, then 6 minutes in Pyrocat-HD 1:1:100. Better shadow definition (well - higher sensitivity, really) from the FX-2, with the enhanced highlight separation of Pyrocat-HD. Nicely stained negatives with a tonal scale long enough for POP, while still great for graded papers. It handled a shadowed mountainside with a sunlit glacier on top - without getting flat midtones. Details were super all across the range (18x24cm film, Symmar 240/420 lens at f:16).