As you hinted, the only way is to redesign them. I haven't read any comparisons of the HE-400i vs. the HE-500s, but I'm really curious. Once I've modded and burned in my new HE-500s (and they seem new, not refurbished, though they could be; have that "new cans" smell ), I'll do some semi-serious comparisons with the HE-560s. Just putting on the 500s to make sure they work OK, they weight was shocking after wearing the 560s. And those velour pads! Brutal, just brutal.