I tried the elastic mod (only had one elastic) on one side, but was concerned that the crease in the pleather would stay, as it was pretty significant. I get the idea, though, and may try again.
I've now done the from the outside stuffing mod using shoelaces, but I am also concerned that it will dampen sound.
I've done this so that I've pushed them super far to the edge - so that if I run my finger around the inside of the cup I feel the plastic ring outside the material covering the driver before I feel the shoelace. Is this appropriate? Is this dangerous for the 'phone?
Thanks for the suggestions as well, everyone.