I have been doing a great deal of reading on this and building an enclosure on the left side. Is the right side a mirror of the left side? My installer made an enclosure with the 13TW5 in the back if my wife's 04 Yukon XL. Could an enclosure be made on the left side but inside of sitting behind the plastic if it was built out so a shallow sub wasn't needed and then an identical enclosure built on the right side? I don't imagine 15s would fit but maybe 12s or Solo Baric L7s on either side.