looks sick man, i remember when i did that to my grand am with my old Rockford p2's, i swear it was louder reverse mounted...
how does it sound tho? i mean the overall system in the convertible. maybe it was just the car i had it in, but i had 2 15's in the back of my old convertible camaro and eventually took them out because they sounded like complete crap. rattled the hell out of the convertible and its components and then i could hardly hear/feel it lol. i even tried putting a 10 in there instead of the 15's and not much difference, just less rattle. still sounded bad.
thats a clean setup tho i really like it