I made some similar over the Christmas break last year. I wanted half cases that would fit grolsch bottles and bombers. I went ahead and made 10 - 1/2 cases and I'm glad I did because all are full now.
Built them in sketchup first.
I had an assembly line going to make all of the cuts.
Stenciled my home brewery name on the sides and aged with tea, steel wool, and vinegar.