1. Have a local machine shop construct two metal cores based on the drawings found in Appendix B. One core should be made from aluminum and the other should be made from 1018 steel or similar material.
2. Construct a handle for each core using one #6-32 × 11/2" machine screw and one #6-32 × 1" aluminum hex spacer. Thread the hex spacer onto the machine screw and then thread the screw into the core's threaded hole.
3. The cores are now complete.