Cylindrical Slide Rule

thingiverse

A brass slide rule replica made from printed material is kept in my car for gas mileage calculations. Searching for an appropriate way to join the pieces, I desired one piece that still allowed a middle hole like the brass version; however, none of my ideas appealed to me. Kindly assist in providing suggestions. Notably, I have since devised a center piece that satisfies me. My friend J. Ferrari aided in the CAD work for this part. In an update, I found that the center piece is bent to fit into the hole. The ends of the piece may not bend easily, necessitating slight bending with pliers. Additionally, it's recommended to print using 0.25 mm layers.