Pocket Galaxy with cord holes
A re-model from scratch of Adafruit's Pocket Galaxy. More information about that can be found here: https://learn.adafruit.com/pocket-galaxy/
It is slightly larger on the outside, but the relevant inside dimensions are identical so the instructions should apply unchanged. This model also accommodates the changed PCB layout of the updated trinket. Adafruit's model has some notches in the wrong place and the PCB won't fit properly.
This model also adds two holes for a hanging cord.
There are two threaded holes which might not come out detailed enough on some printers, so you might have to glue the parts together.
We had great results ordering this from shapeway in black using their "flexible and strong" material.
The original Fusion 360 model is available here: http://a360.co/2ATOVLI