Bowden Extruder Holder M8 Rod (open ended)

Bowden Extruder Holder to fit an M8 Rod that is open ended so you don't have to remove any rods to attach the holder. I don't think this will ever be as good as a holder with an enclosed M8 rod end that you would clamp between two nuts such as http://www.thingiverse.com/thing:550727 but I didn't want to dismantle anything. My goal was to attach the Bowden Extruder http://www.thingiverse.com/thing:275593 so I could try it out before deciding if I wanted to build it into a new printer.