I have used Microdol X developer 1:3 @ 68 degrees for 16 min. w/ 30 sec.inversion agitation for over 30 years with a teaspoon of sodioum solfate. This combonation has yeilded some very nice fine grain negatives, however; I am always open to improving my technique. Anyone have a better mouse trap? Thanks Walt(posted 8425 days ago)