The main reason for doing stand or semi-stand development is to bring out the shadows without completely blowing the highlights. /QUOTE]
Actually, another big, big reason is for edge effects. What you're talking about is compensation, and is technically possible with any developer that is diulted sufficiently (which isn't nec. all that much, BTW). Edge effects are the increased micro-contrast as developer moves from areas of high to low density (or the other way around?) without actual tank agitation. A&T give a much better description in the FDC, of course.
That's the main reason why people tend to use acutance developers for stand development.
I'm glad that you're getting some interesting results from your experiments.
allan