I guess I'll have to try it and see for myself, but I'm wondering if anyone has tried D-23 with say 5g Metol instead of 7.5g. It is sometimes used with 5g as the A bath in a divided setup. But I'm more interested in a strange reference to Henn's Microdol research in Anchell/Troop - apparently while working on Microdol it was found 5g Metol in D-23 produced the same results as 7.5g. I'm not sure why this would be the case. Presumably there would be a difference in contrast for given developing time. Perhaps with less Metol there might be a slight increase in sharpness, particularly when diluted. Or maybe not. Maybe the extra 2.5g is superfluous.