I replaced the denser dust cover on my MK1 BL pads with legging material. There is quite a significant change in sound, for the better. I wish I could remember if my older 007 MK1s had the thinner or denser material on the pads, I am guessing they were all later production models with the thicker fabric since they all sounded the same.

Played some Music Matters vinyl (Out to Lunch 45 rpm) and the recent Soft Parade 45 rpm remaster. The better the recording the more open the O2s sound with the thinner membrane. Bass performance didn't change and was still tight and articulate. The pads fit and rotate fine, but I think I might still see about making some leather O-rings with the legging material stitched in the inside. Either way I will be replacing the current leggings with black ones since they are a very light brown and I hate when stuff mismatches.

Cool, when my new black pads come in I'll try it.  It seems like such a simple yet pretty effective mod... and you don't even have to send out to Iceland to get it done.

Also eBay here.  I've seen yahoo japan as well but frankly that's too much of a mess to deal with.

hmmm if harmonica is more peircing that would indicate an increase in upper mids.  Could be a good thing though since the upper mids are recessed on most 02's right?