Holes have to be drilled in all pieces except part E. »For part A, cut a large hole in the center, anywhere from 17⁄8" to 2" in diameter, depending on the size of the domed half of your capsule. Then drill 4 countersink holes about 1⁄2" in from each corner, for the wood screws.
For parts B and C, cut a 21⁄8"- diameter hole in each center. These holes will house the bottom part of the capsule. For part D, drill a 3⁄8"-diameter hole in the center, which provides a guide for the spring.
Nail together parts B through E with the finishing nails, avoiding the corners where the screws will go. After this bottom block is assembled, insert the spring. Place a die into the capsule, snap it, and lower it into the wood block. Part A will cap everything. It requires a slight push to keep it in place as you screw in the wood screws.