After a couple days in Sketchup and several iterations, I've designed a (so far) reliable electrical switch that, besides the printable plastic housing, only requires about half of a large office paperclip for the conductive components.
Detailed instructions for assembly (with more pictures) available here: https://www.instructables.com/id/3D-Printed-Electric-Slide-Switch-Using-Only-a-Pape/
slide_switch_v2.skp | 219.0KB | |
Switch_Body.stl | 8.3KB | |
Switch_Slide.stl | 3.8KB | |
Switch_Top.stl | 5.1KB |