This is a case for the Orange Pi One. as in the OPI+2 version (http://www.thingiverse.com/thing:1290760)i have made this in layers.
There are four layers and you could print them in different colors.
The base has the holes of 3mm, and the subsequent layers have the holes of 4mm to have some space if there are some misalignment or bad measurements.
Also it is provided a complete box case using the same base.