so i got a 12' altas and i want to build a box for it. some of you may think it is easy to build one. ok question is this is going to be my first build. how do i start this thing off? this is what my thoughts are just build a box to the dimensions i want of how big it is going to be and just put a 12' hole. someone help plz b/c i rather learn to build it myself than to pay someone and not learn anything.

 

you've got a decent start, you should measure your trunk area and see how you want your trunk to look. since you're building a box from scratch, you might as well build a custom box to your car.