This mount is designed to put an STM F3 Discovery board on a quadrocopter. This special mount is needed because the F3 does not have any mounting holes. It holds the board with side clips.
It accomodates to 2 different sizes of typical quadrocopter designs.
This also means that the base of this design can be used to mount a big board (e.g. quanton) onto a small copter. Just use the object from the sketchup file.
This is the corrected layout from netfabb and prints OK with an ultimaker.
Screw on your quadro. Then clip the board on.
It has to be the last item on the copter as the board is really huge.
The board can be mounted upside down to allow easy access to the pins from the top. If you do that, you need to remove the button extensions from the F3 to avoid accidentally pushing reset during flight.