Ghost Line Driver - The Ghost Line driver is designed for fast repetitive use, like that of a drywaller.
I noticed while watching several different home improvement show that while people were putting up drywall, they change how the held their drill to make it easier to use. They moved their hand higher on the drill, and used their middle or ring finger to operate the trigger. In my design I made the entire back of the drill into a handle. This allowed me to shorten the traditional handle. This results in a straight line of pressure between your arm and the head of the drill.