This mount is specially designed for the Hobbyking color 250 quadcopter frame.
I added the solidworks file so you can adjust the holes to fit your frame.
i took the model of this thing: http://www.thingiverse.com/thing:941092
and improved it.
I added more different angles in request of horex1000.
Available angles: 10, 15, 20 and 25 degrees.