The precision of 3D printing with the strength of Carbon Fiber, Kevlar or Fiberglass.
Fiberglass is the most cost-effective material. It's a strong as Carbon Fiber, but 40% as stiff, and 2X the weight. Suited to everyday applications where you need strong parts.
The Fiberglass layer materials are inside of the shifter (not visible), but stiffness will be noticeable).
Also note, the side and back of the shifters are now all black.
Install video - https://www.youtube.com/watch?v=tL4I0dvXExY