I recently picked up a used Dreamcast controller, but the triggers felt a bit funny. The triggers are held in place with a spring and pivot on two tiny plastic pins protruding from the sides of the trigger - these had snapped in my controller, rendering the triggers useless.

This is my attempt to fix them, a part that can be glued inside the hollow trigger in place of the broken pins.

It's okay if the large pads don't print well, I found it hard to get my slicer to print support underneath the pads so printed without support. After cleaning up with a knife there is still a good surface to glue to the inside of the trigger.