As one can see from these stills from the video, some parts must be inset / smaller than the nominal dimension of the box to allow for joinery:
The shadow box which we envision making will have the orientation of the boxes from the video being set on their left side as viewed above. Therefore:
- the left side will be full depth so as to function as a stop
- the right side will have its depth reduced to allow the front of the box to slide in place
- the top and bottom will have dadoes for the front and back, and rabbets (rebates) for the side (please see the glossary if unfamiliar with any of these woodworking terms: https://www.shapeoko.com/wiki/index.php/Glossary )
- the front and back will need to be reduced in dimension to fit — we will not be routing rabbets in them due to the thinness of the selected stock