Thanks 1st MP3 in NH, the guy that will make the custom box was telling me that he will make the custom box on the way that it will be fit close to the back of my back sits so it doesn't use a lot of trunk space, so for what I undernstood, he is going to change the shape of the box to gain space, can this be done and still meet the recomendations of Alpine, like making long and short rectangular box will be similar than a square box?