I've had several posts here the last while asking for information on building your own sub. I think I've finally chose a design and would like to start building. I won't get my main parts the 12"dvc and amp for another couple of weeks. For those people who may own these items... Are these measurements on the PE website accurate? Can I start to build now based on the measurements from the website or is it wiser to wait? Driver Cutout diameter 11" total hight 6-3/8" small diameter 6-1/2" Amp cutout dimensions 9-5/8" x 7-1/4" Thanks.