Kevin or other knowledgeable persons. I plan on using the Tempest-X2 in my enclosure. The external dimensions are 18 x 20 x 52. The slot port is 3 x 18 x 44. Do you think the port dimensions are good? I could take some length off if neccessary. The driver and port will face the carpet floor(about 8" off the floor). What do I use for fill and how much of it do I need?