Has anyone ever mounted anything under the rear deck? I'm thinking of pulling the existing package tray out and making a new one. I want to replace the existing rear speakers with 6.5 woofer on each side and put an 8 in the middle. I want to cover it with tan vinyl and use the factory rear covers and cover the 8 with a flush mounted grill cloth cover. Under the rear deck I want to enclose the sub and make a rack for the amp and changer. I just don't want to interfere with the pass through rear seats. Anyone have any experience with such an idea?