Do you know the person who built the box?
Honestly, they could have it made completely wrong and you have no way of finding out unless you take it apart and take measurements / crunch numbers. And if your going to do that, you might as well make your own box and rest assured its done right.
If your planning on taking out your back seat....then just get a wall //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif
Honestly, they could have it made completely wrong and you have no way of finding out unless you take it apart and take measurements / crunch numbers. And if your going to do that, you might as well make your own box and rest assured its done right.
If your planning on taking out your back seat....then just get a wall //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif