He's not going to replicate a TCAB box for $50 //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif
After carpet, ports, wood, interior coating, wire... glue... screws... it adds up, especially when your buying everyhing to just make the one box.
Or, just buy a great box from the start and rest assured the woofers are doing everything they can in the vehicle with the given power, instead of having to build a few boxes to get things to work properly, that is, if it EVER gets to the level it would have off the bat with the TCAB.