In luthier language, "Boxing" is the act of glueing on the back of the instrument you are building, thus it is boxed up, the inside not accessible any longer. Well today was that day for this build of tenors.
It is always a big day. You carefully fit and trim, adjust and fuss and when finally you have it right, apply the glue, slap on the back and with clamps and huge rubber bands you clamp it all together. In about an hour, you will have MOST of a ukulele.
Once the glue has set, it is time to trim the edges with the router. Here is a trick that Mike Chock showed me. To allow the trimmer bit to be just a hair above the side, and to allow you to do the final work by hand with sand paper, you place a strip of masking tape on the body. The trimmer rolls on that tape and cuts the width of the tape away from the side of your uke. the remaining edge you finish with a sanding block.
Now holding it firm with this little clamping device, you are ready to trim up the edges.
The router does its job and the edges are now trimmed.
And the ukes are all boxed up. Ready for the binding.