Step 3: Cut and Glue Pieces
Something I should have done before doing all the gluing is drill a 2mm deep pocket for the retaining rings to sit in. Use a 1/2" forstner drill bit. See Picture 5.
The finger joints fit together really easy so all the joints can be glued and clamped easily. Cut three 2.56" long pieces of 3/8" dowel and sand down 1/4" of the end of the pieces so they fit in the spool holder with the flat-sided holes. See Picture 4.
Glue the spool holder with the round holes goes on the bottom side of the box lid, then glue the dowels into the holes and glue the other spool holder on top.