Earphones case for Sennheiser in-ear earphones

Earphones case for in-ear earphones.
The holes for the in-ear part is 9mm, so it can hold tightly my sennheiser in-ear earphones.
The original idea was to make also a cover that can close the case using a clip - this is why we have a central hole.
This is currently a work in progress, more improvement will arrive (sooner or later).