Clip-on bracket and mounting box

Adapted from Box with Latching System *NEW*
(http://www.thingiverse.com/thing:69518), I needed a clip-on system that joind between two pieces, rather than on the same side of two pieces, as in the original.

The clip works, though there's some play. The smaller piece, "bracket outer", is quite small, about 10 mm wide. The asymmetry in the other piece, "bracket inner", avoids overhangs when printing.