Making Some Sawdust
Grab the core blank you cut earlier and the core template and trace the shape onto your blank. If your blank is a bit oversized, align the template with two edges of the blank when you trace the shape, so it will reduce your cutting on the band saw.
When you’ve completed the band saw cut, step over to your drill press to bore a 1/2″-deep hole for peg storage and a two-step hole for the pivot hinge. When forming this two-step hole with Forstner bits, make the shallowest hole (5/8″ diameter by 1/16″ deep) first. Then you can easily align the deeper hole (3/8″ diameter by 3/8″ deep) by using the spur depression left by the first Forstner bit. Go ahead and drill the small hole for the magnet at this time, too.
Next, drill out the four corners of the card recess as shown. I used a handheld jigsaw to remove most of the waste from the card recess.
When that is done, use a couple of pieces of two-sided carpet tape (not too much!) to secure the core template onto the core. Then chuck a 1/2″ bearing-guided pattern routing bit into your router table. Trim the card recess opening. Then you can shape the outside of the core in the same manner. Cutting the curved shape at the end of the board with a router bit can be a bit tricky. You may be better off just sanding it smooth to your marked line, although I did OK by climb-cutting around the radius. Pop the template off of the core and set it aside for now.