If you've never worked as a musician or served food or drink you may not know what 86 means. Suggest you read the great story about its origin on WIKI.
This is a 4-color 3D print designed to be printed on a Prusa Mk3S with MMU2S multi-filament attachment.
The bottoms of these buttons have varied from open to accept expoxied bar pins, push pins, clip pins, spring pins and magnet attachments. The files uploaded are the final design interation for securely epoxing bar pins to 3D printed buttons using a tab and epoxy to contain the pin. Put small dab of epoxy just below the tab, push bar pin onto dab and slide pin under the tab. Pin is locked, centered, and secure.
I test, optomize and tune small batches of 4 color buttons then run sets of 25 or so on Prusa Mk3s MMU2s to minimize purge blocks waste.
Model files were created using Illustrator and Rhino3D, converted to STL files and each color is exported with origin.