3-D Printer Repair - Fractured X Axis Belt Tensioner

My 3-D printer is a Rep-Rap style machine and therefore it is made from several 3-D printed plastic parts. Recently one of these components broke. The part which holds the X axes stepper motor belt fractured as you can see in image.

Broken belt tensioner for the X axis.

I got in contact with the manufacturer (Omni 3D) and got a copy of the CAD file for the part. I used some Heath Robinson inspired adaptions to the printer and got it to limp along and print out successfully the replacement part reasonably successfully, to a surprisingly high quality.  I increased the thickness of the printed part, especially around the fracture sites of the original, to make the part more durable.

The 3-D Printed replacement component.

This demonstrates the benefit of the Rep-Rap 3-D printer model as it allows components which are under stress or wear to be manufactured by the 3-D printer itself, reducing the need for components manufactured elsewhere to be stocked.