Hi, i have some 3 way pioneer 6 by 9s sitting around at my house and one of my rear speakers just gave up. I was wondering if anyone had modified that cover in the rear to allow for the installation of a 6 by 9 speaker, or if its too much trouble and i'd be better off just getting a nice set of 6 by 8s. If its been done, i was wondering if anyone had any pictures or advice. thanks.