I got my T1s and now that I can see the texture of the exterior, I guess I wont be sticking anything on the outsides of the cups like blu-tack. However, I used to use lead shot on equipment including speakers to reduce vibrations. I wonder if a small plastic bag of lead shot taped to the outside of the cups would do anything. Once I have gotten used to their sound, I may give it a try.
Let us know how it goes! :P