We'll need to dig Fred Picker up to answer this :-) Seriously though, regarding sharpness, the sharpest prints I have ever made were from PMK developed FP4+ printed through a colour head. Regarding contrast, conventional wisdom says to always reduce development times from what the manufacturer recommends. In my experience, if printing through a colour head, this is bad advice, I find that the manufacturers advice is pretty much spot on for colour heads. Condenser enlargers are another matter and need slightly reduced development but as David Vestal found, the resulting prints cannot be told apart.