As some of you know already, my other hobby is audio. And as a frequent voyager, audio means portable audio.
We have created a couple of 3D pieces for problems that we have found in our portable devices.
We are lovers of the Stax Lambda electrostatic headphones. However, sometimes the side assembly breaks. We have designed a 3D replacement, that you can find in our audio area or in our webshop in eBay. It just plugs into the hole of the headband and allows some rotation on its axis, since it has been designed with the stem printed within the body - this you can only do with 3D printing!
This piece helps solving a problem for many users - I hope! I have found yet no other use for the "print inside" capability of the 3D printers.