Spool bracket for Printrbot Metal Plus. Hole is sized to fit 3/4" PVC pipe.

It mounts onto 2 of the 4 Z axis screws at the top of the frame. This makes it very solid and doesn't affect the Z-axis guide.

It is way over-engineered. Use 2-3 walls and print with a 10-20% fill and it should work fine.

I printed a set (pictures attached). took ~2.5hrs per side. Cura and Repetier both have mirror functions to print the left bracket.

I will eventually update this to maintain rigidity with less material.

Please comment and request. I'm pretty flexible and if you got a neat idea, I'll whip up a prototype :)