I'm in the process of double checking all of the earpad combinations to make sure that the beyer pads are needed to get the sound described. Unfortunately, when I removed the duct tape from the pads it stretched the plastic that holds the gel and foam in place making it feel a bit wrinkled, but it's not too bad. So, for any potential modders out there, refrain from using the type of tape that leaves residue when peeled off. It may help with that problem. If you did, just use alcohol to take the residue off.
EDIT:I finished with the combos, and I'm having second thoughts about the "GBH-1000". The 1000's sound deeper and smoother at the sacrifice of the highs and mids (slightly quieter), while the velour+cotton has more impact without lowering the highs and mids. The 1000's also handle distortion better than the velour+cotton, meaning that the distortion is less audible than the velours are, making it a bit more tolerable when blasting your ears. I apologize for anybody out there looking for the beyer gel pads to do the GBH-1000 mod.
Update: Come to find out the pads needed to be positioned correctly to sound good.
Update 2: Disregard my edit. I was talking about my older GBH-1000. The differences between GBH-1000 v1 and v2 is that v1's sound is more vieled because of the velour earpads. v2 is better than v1 in every aspect. After getting used to the gel, they seem to disappear on your head after you wear them for a couple minutes.
Edited by Trae - 7/14/12 at 10:32am