That is partially why I still have my bra on. I can do duct tape mods for testing, and no one notices (right now my wife is driving the car and she doesn't care. I did take the top part of the bra off, which makes it look a little different, but not bad (IMHO). Once I have it right, I can easily sew or glue on some black vinyl that matches and have a nice block off that I can remove and the car is back to normal (oh, and my car already had a bra from the previous owner).
before
after removing top, and with duct tape over all lower inlets-
after
(I appologize for not having pics inline, I need to find a good place to host my pics that will allow a direct links to the pics)
-Mr_C