im attempting to make custom woofer enclosures for my civic, i have 2 twelves and want to place them into the rear corners of my trunk facing up in and foward, how can i make a cast of the subframe to maximise volume in a such a small area ive tried a wire mesh to get the shape, that was a pain and unefficiant then i tries bondo and fiberglass mat but couldnt keep that in place, how do all u guys get those sweet custom speaker enlosures?