This plastic top part of the Thorens TD 156, 166 is often very brittle after 35+ due to aging effects, evaporation of the rubberizing agent etc. This 3D printed replacement is both stronger and more flexible than the original part, due to an enhanced design and more suitable material. One hinge part. Original on top, 3D-printed version on the bottom of the first picture.
One Thorens TD 165, 166 3D-printed hinge top part