It'd be hard for you to insult me Astro, we're pals in my book.

A mitre joint would have been the absolute wrong choice in that situation. Those are structural pieces, and not merely trim. They are morticed and tenoned for strength. And that is one of the strongest joints there is. A mitre joint is inherently weak, it provides the least amount of surface to surface contact between the woods. It is normally used on trim. For a nice mitre joint look at the lid of the box. Those wide sections of Black Walnut that band that White Oak panel there are mitred. The mitres and edge joints in that lid are reinforced with biscuits. Just in case.

But on the inside, structural pieces, of the box, a mitre joint just wouldn't cut it. Be sure if you're looking at fine furniture that a strong joint is used in structural locations, and pretty mitres are saved for trimmy show off spots.:thumbup: Thanks for giving them such a good looking over though.