The document discusses three proposed designs for a supplemental exoskeleton to improve upon current cast designs. Design One takes inspiration from mouth guards and uses a heat moldable material with an internal resistor for custom fitting and faster healing. Design Two is made from a dissolvable polymer that can be removed using alcohol or hydrocarbons and has reusable material. Design Three uses a large plastic frame with inflatable air bags to fit the patient's arm like a blood pressure cuff. After considering the pros and cons, Design One was chosen as the most cost effective and comfortable option.