My cat, for god knows what reason, left her claw marks on the dust dome of my Fostex FF165K. Maybe she saw a bug or thought the light reflecting off the aluminum dome was a bug. She didn't pierce it but she did make some big creases. I got some of the damage out with a vacuum, but not all. I don't know how much this affects the way the full range speakers sound. Now, the question is, has anybody tried phase plugs after removing a dust cap? Fostex no longer makes these drivers, and there is no perfect substitute.