Scoliometer for the scoliosis

This is a 3D printed Scoliometer. As all disclaimers will say, this model is just for your recreational use, not a precise medical equipment and should not rely on it for any medical conditions. The scoliometer is not cheap, but the concept is easy enough to design and print. My son's scoliosis does not have the severe rotation that requires to closely monitor with this. Seeing how much this costs, I did this as a proof of concept in case I need one. A cheap plastic 6mm BB pellet and 1/4"(6.3mm)