Possibly a bit simpler than the Blind Miter w/ Hidden Boxjoint box:
https://willadams.gitbook.io/design-into-3d/blind-miter-box-joints
would be a Quarter Blind Boxjoint:
https://www.blockscad3d.com/community/projects/1432012
As always, we start w/ the dimensions:
- 204 mm wide
- 70 mm deep
- 42 mm high
- 8 mm thick stock
Lid options are the usual:
- sawn
- sliding
- hinged
Sliding is probably the simplest, but hinged has an interesting limitation if one wants the hinge hidden, so we’ll do that.