The basic box shape laid out on the bottom. The center line helped with down the road assembly. The jig board at the rear of the baffle line helps keep stuff square and gives someplace to clamp.

Here's the baffle. I suppose purists would have used a router, but I did the cutouts with my jigsaw. The braces turned out to be a bit short, by the width of the saw blade. The most used tool in my shop is that old office chair. After all the carving they've done on me, I do a lot of work while sitting.