The Adafruit Pro Trinket (Think -tiny- Arduino UNO) has 3 mounting holes placed where they could put them. Its really small and things are really tight! We needed to mount one of these processors on a quadcopter so we came up with this nifty mount. It converts the Trinket to two holes centered 1" apart. 2x4mm socket head machine screws will tap themselves nicely into the holes.
We print them 20% infix, 2 shells. No support.
The Pro Trinket : https://www.adafruit.com/product/2000
Examples of how we're using them.
Light bars : https://vimeo.com/120994547
LIghts #2 : https://vimeo.com/120866527
Police & floodlight : https://vimeo.com/120127973