I see someone linked that old pdf I made about FX-37 a few years ago. I still feel the same way about that developer…. It is still the only developer I use on roll film. It gives me full film speed, controllable highlights and superb sharpness, plus it has that very hard-to-explain but very easy-to-see grain structure that I like. The grain clumps have very defined sharp edges, and this can lend an apparent visual acuity to the resulting prints that makes even so-so lenses look pretty good.