Stepper fan mounts for Prusa i3

I was struggling to balance voltage vs heat output on my steppers, and so, after a bit of playing around, decided to keep them cool with some 40mm fans. This has proved to be extremely effective.

This 'thing' includes fan mounts for for the x-carriage and the extruder on my Prusa i3 (which came from http://makerfarm.com/ ).

My extruder fan mount provides for a couple of air paths (primarily onto the stepper, but also down onto the j-head), as well as support for the rear of the stepper (which IMHO is a weakness in Greg Wade's extruder design, as the hot+heavy stepper is cantilevered off a relatively puny, heat-sensitive, plastic armature).

The extruder fan mount is printed in two halves that are joined (rivets / bolt / weld) after printing (see first image).