I'm close to pulling the trigger on a pair of the Double Trouble subs, but have a question about how they are built first. Are the top and bottom pieces structurally necessary? Or can I omit them? I'm talking about the pieces that stick out past the main body of the cabinet. I know it's a small amount but I have fairly limited floor space and that extra bit of width seems very limiting. (considering I need to find space for the amplifier boxes as well). In the cabinet plans pdf on the GR website that part is describe as a decorative base, so I assume it's not strictly necessary, but I'd like to know for sure before diving in.