Unique Sealed Sub Box Build

I wanted to add a sub to the boat and I needed a project to keep my mind occupied, so embarked on this little project. I bought a JL Audio 13w3v3-4 and a sheet of 3/4" birch plywood. I didn't want to relocate the start battery to the observers storage compartment, so in order to get enough volume behind the speaker, I had to create this uniquely shaped box. Without bracing the volume is 1.86 cu ft. With speaker and bracing the internal volume is 1.496 cu ft. Pretty close to the 1.5 cu ft that JL Audio recommends for the 13w. I used biscuits, wood glue, finish screws and epoxy to glue it together. Surprisingly, all my joints fit flush except for one.