I have created an enclosure for it. It is big enough to house 4 of those little boards. I put the board with the heathsink facing down. If anyboby is interested I will publish the FreeCAD file and stl files on my website. I had to do it without the benefit of the 3D module.
Sometimes though it is a nightmare with the 3D. For BeaglePlay for example, it is extremely slow. It would be nice if the file would not be as complicated maybe it would not take fovever to load.