I'll have to remember your use of brass dowels. I followed the more traditional wedged thru tenon design and by the time I had finished the second box I swore I'd never do them again. Yours is destined to be a shop show piece. Fill it full of acid/flux brushes for spreading glue. Should be the perfect size.
Some of my most creative moments have been when I've had to cover up an error in my woodworking.