re: Wrap it Up...

SG: I've never glued box joints, ever, have always connected them mechanically with dowels...
It HAD to have been done before, but I never saw it and dreamed the idea up for use in my own work... And it was exactly because of that,  the thought of the messy squeeze-out of the glue and the vision of the resulting clean-up, that made me wonder if dowels, pre-drilled and sunk in, would be a viable option...
Dozens of boxes later, with no failures as yet, I'd suggest that it works!
I've done stopped-dadoes many times too, and that works, but I can't shake the feeling there's something fragile about the corners done that way???
The chinking blocks fill in the voids completely! And without even attempting to "match everything up", so long as the grain orientation is maintained, they are virtually invisible...
And even if somebody goes over the work with a fine-toothed comb,  and notices them, the blocking will stand testament to the builder's care and attention to details!