So I like the blues and this post reminded me of this Albert King song. Anyway, my next activity was to cross cut all the box sides to length and miter the edges. All in all this wasn't too difficult of a task. The article suggests using a crosscut sled on your table saw. I completely agree, this makes the job much easier. fortunately my table saw has a miter-sled which almost does the same thing. The only thing I needed to do was attach an auxiliary fence to help support the board behind it as well as provide a surface to mount a stop block against. Cutting all the front/back sides at once and then all the left/right sides at once was a really easy way to make sure all the sides we the same. The results we pretty good and the boxes look like they actually have a good chance of being square. Bonus!
Don't mind all the scribbles. The pictures on the right show the sides inside face-up so all that will get sanded out later.