Slot 4 sides with engraved squares into one side with no engraved details
Slot the previous assembly onto the other side with feet.
Flip the assembly over and glue the bottom plate on
Glue the lid on making sure that the side fins line up with the notches sticking out of the lid
Superglue the acrylic frame onto the top of the lid. You may wish to sand/file the corners of the acrylic to make a nicer transition to the banding as it wraps around the sides.
You’re all done!
Prime with Rust-o-leum Profesional Enamel flat black and paint as normal with hobby paints.