Fan bracket

This is a fan bracket which provides a bit of extra support for this thing http://www.thingiverse.com/thing:839620 or this one http://www.thingiverse.com/thing:987586. It attached to bolts set 31mm apart (the pitch on a NEMA 17), and was designed to work with my E3D mount, http://www.thingiverse.com/thing:990300.