I am figuring I am just going to cut holes in my rear deck and drop the speakers in and mount them, but I have a few questions. First off, my rear deck panel isnt very rigid, What would be a good way to add rigidity to the panel? Should I fiberglass it? I was thinking acoustical matting would help as well. And I was also planning to sort of mount MDF spacers onto the rear deck panel as well. Basically the rear deck panel is a thin piece of fiberboard, unpainted uncarpeted, so I can add either vinyl/carpet after speakers go in for a more flush appearance, so being flush on install isnt all that important. Now with the speakers dropped down thru the rear deck they are pretty much infinity baffle, should I build boxes and attach them to the underside of the rear deck to make the speakers enclosed? OR should I build boxes and mount the speakers ontop of the rear deck? 5.25 alpine type-x components Ideas/Comments ?