The sr-202's are glue, not sticky tape. That might explain why
the 202's sound a bit different than the 404's, along with the smaller cable.
The highs are less aggressive.
My experience with woodies and damping on Senn's was that it's hard
to find a medium. Anything that helps one end of the spectrum really
screws up the other end.
I did not glue the driver to the front mounting plate. I used sticky tape.
I looks like the only way to really improve the newer series Stax is an
enclosure change, or a change in driver contruction.