I know I know, sorry for the scars I incurred on you Wayne (you were probably the only one who actually took the time to read my original hurtful post 2 days ago).
Seriously though, I was contemplating real hard earlier today in selling these HE400s because they (with vintage HFM velours on) sounded downright sibilant and U-shaped low-fi beside my HE500s (which had the jergpads on); then as a last ditch effort I swapped the jergpads back onto the HE400s and I've been listening to these instead of the HE500s for the past hour or two.
I ain't even trying to promote my mod, every HE400 owner owes their HE400s this mod. It's laughable how downright unlistenable the HE400s sound with other pads relatively speaking.
I'd be willing to buy a version of your jerg pads to test out.