Described herein are systems, apparatus, and methods for precise placement and guidance of tools during a surgical procedure, particularly a spinal surgical procedure. When a conserve setting is selected, a flow of oxygen travels through an oxygen regulating valve that has an open state and a closed state. Initially, the size of the first fragment of a packet will be set to a maximum number. The described invention permits the value of the frame synchronization bytes to be made programmable, so that the system and method are flexible for changes in communication protocols. The teeth may be formed in the second material by an additive or subtractive process. The application server provides persistent storage of remote services infrastructure information.