I'm drawing up a custom enclosure, this will be my first time building one, so I had some basic questions I was hoping someone knew answers to Whats the minimum distance I should keep from the cutout for the subwoofer, to the edge of the board? How exactly does one carpet a enclosure? I get the get the general idea (I think). Sand box, glue box, roll down carpet and cut. What I dont get is how you fold edges, etc. so that you dont see any cuts, or gaps, or lumps on the corners. Do you overlap sections? Or do you cut at every corner? Hows this work? The subwoofers I have, have a reccomended enclosure volume of .5 cu ft. Does that include the mass of the woofer in the box, or is it the volume before the sub is in there?