To bore the hole for the 1/4-in.-20 threaded insert, first cut a cradle to hold the angled face of the core parallel to the drill-press table. Then bore a 13/32-in. hole. Use a bolt with the head cut off as a driver for installing the threaded insert. Jam two nuts on the bolt, twist on the insert and install the bolt in the drill-press chuck. Turn the chuck by hand while lightly advancing the quill.
Finish the rear core piece by cutting the maple blade-alignment boss to size. Bore holes for the two 3/4-in. brads, and glue and nail the boss in place using the cutter as a positioning guide.
Move to the front core piece and bore a 1/2-in. hole through it as shown in the “Front Block Assembly” detail. Then cut the ledge to receive the maple cap and remove the remaining waste around the hole as shown. Cut the cap slightly oversize, glue it in place and sand the edges flush. Bore the 13/32-in. hole for the 10-24 threaded insert and install the insert.
Cut the finger-grip recess in the sidepieces using a router and 3/8-in.-rad. corebox bit. You can use a router table to do it, everything is so simple if you have a best router table. Build a jig to hold the sidepieces for routing as shown in the drawing. The 1 1/2-in.-high guide strips allow you to do the job with a nonplunge router. Angle the router with the bit away from the work. Then, turn on the tool and lower the bit into the work. To cut the recesses for the decorative brass strips, use a straight bit and shift the guide strips as required.