It just opened everything up. Joker reviewed the moded and unmoded KSC75, and while he may disagree, I would guess that the biggest contributor to that was his Kramer moding, though the distance from the ear may have increased soundstage.
I don't think you could get much more thorough than this: http://www.head-fi.org/t/124243/kramer-mod-ksc75
Thanks a lot! The mods look intended for the KSC75's on their earclips. I really like using the KSC75 drivers on the headband - hopefully those mods (or your mods) would work OK for that. I will go through that thread and see what I can find. Thanks again!