40mm fan - ultrasonic Sensor mount

I made this model as a test rig for an ultrasonic bed leveling system.
This part is designed to mount an ultrasonic range finder to the fan on a stepstruder/MakerGear MkX direct drive extruder.
This is my first 3D model uploaded to Thingiverse. I may have to redesign it now that I think about it, as there is nowhere for the leads coming off of the pin headers to go.
##Update - 9/17/14
My Prusa i3 had trouble printing the fan grill vertically, so I am working on a new design. The new v