So my latest project was making a wood floor for the trunk, I also put my sub in (have had it for a while). I bought the click style flooring, then put it together and traced the outline of the top floor mat on it, cut it out with a jig saw, added some bracing on the bottom (to make sure the slats don't come apart), then cut an access hole (for the space below). Mounted the access door with a piano hinge, just looks a little cleaner. Has anyone else done anything like this?