I know this is an old post, but I just had to say WOW, this box is stunning. - I'd love to have a go at doing something like this when I finish setting up my workshop and I have plenty of time to move and work. Keep up your amazing work.
Thank for the feedback Currently travelling around Aus sorry for the late reply. These joints can not be done by hand and require a jig to cut them they are called isolock joints. you can check them out on the net.