I'm getting ready to build my second maritime sea chest. This time I'd like to incorporate the unique slanted sides that defines the chest as a "sea chest". Has anyone previously built one with slanted sides and if so, what angle did you use on the slanted sides? Also, when it comes to the slanted sides the top and bottom edges (front & rear panels) must also be angle cut accordingly. What angle would these be as well? Perhaps someone has some sketches and dimensions that they'd like to share?