To make typing the inside row and furthest pinky key finger (OOOL) strain-free, a "spacer" is required. The spacer is a solid block that widens the gap between the inside of the index finger knuckle and the side of the Twiddler. Expanding the gap between the index finger knuckle and the Twiddler realigns the fingers in such a way to allow strain-free typing of the inside row keys and furthest pinky finger key. The size of the spacer will vary according to the user.
