"Who summoned me?"
("Anime" fans will have a laugh at that)
I love the sound of my HD 600's, but I'm getting annoyed by the literal skullpains I am getting while wearing them for longer periods.
Had anyone modded their HD 600's to get rid of this issue, more padding for instance? Such a shame I cannot wear them comfortably for an entire evening.
Is the pressure stronger on the flanks than the center of the headband? You have to reduce the clamp force. Stretch out the metal frame and bend it outwards at the center, holding for 10secs, then repeat for the other side. Then repeat this closer to the gimbals.
If you have any old pair of earpads, gut them and mount a pair of HM5 angled earpads on the plastic mounting sections. Those are a lot thicker, so in addition to the frame bending, these puts a bit more distance between your skull and the headphone from the earcups to the flanks of the headband top/center section.