Headphone Hanger for Office Cubicle Spacebeam

This headphone hanger is designed to set into the grooves on office furniture desk mounted beams.  Several office furniture manufactures provide desk mounted bars with groves to hold different office equipment from monitors, paper sized shelves or just cups for pens.  These mounting bars are sometimes called "Spacebeams".  If you work in an office with multiple networks (enclaves) and have headphones for each, this split or dual mount works cleanly with two, but could hold more.   

*Note the image showing the headphones in action is a mockup as cell-phones/cameras are not allowed in the office. 

I recommend printing this design upright for the most sturdy result.  As show in the pics, a vertical prints will require supports and brim to prevent tipping over early during production. The pictured examples use a 2 wall print (Vertical shells) with 10% infill resulting in a little over an hour print time on a Prusa Core One.  Tested with PLA and ABS filaments, both work well.  Once people in the office see these, everyone else wants one... or two.