JayBird Bluebud Ear Fin

I lost one of the rubber fins for my JayBird BlueBuds (which are awesome!!) and they'd sometimes made my ear ache a little after many hours of use, from being a bit too stiff. So I decided to design my own replacement. You'll need a length of NinjaFlex to build these. The regular Replicator 2 extruder and build plate should work fine though.

Optimised heavily for 0.4mm extruder nozzles on FDM printers. Any MakerBot will work, or nearly any RepRap derived design. I've only tried slicing with M