While reading some posts a while back a thought struck me (I know, I should have ducked! ). As the stain on a pyro neg acts toward light in the same fashion the dye clouds in color film does, what difference in effect does a condenser enlarger have on the tonality of a pyro neg as compared to a diffusion enlarger? I know this has got to be more complicated than a pure silver negatives response because of the dual nature of the image. Or does the stain image merely negate the effect the collimated light has on the silver grain image?