Abstract: Aligning a drill bit for preparing a bore to receive a dental implant. Using a frame to position cartridges, the frame fitting patient anatomy and having a chamber to receive cartridges. Creating an initial cartridge with an opening to receive a guide sleeve. Optionally, mounting at least one measuring device assembly onto the initial assembly so that measuring device assembly takes measurements with a known relationship to the initial linear trajectory. Using the measurements to enhance a model of the surgical site and to select a surgical linear trajectory for a surgical bore to stay within bone found at the surgical site. Placing a surgical cartridge into the chamber; and placing a guide sleeve in the surgical cartridge with the guide sleeve oriented along the surgical linear trajectory to constrain a drilling trajectory of a drill bit along the surgical trajectory. Many variations disclosed.