Summary

Elbow connector that connects from the vertical metal rod on a PrintrBot Simple to a 1 inch PVC. Use it to make a support for a filament spool.

Instructions

Print two of these elbow connectors, one for each vertical rod. Then cut the following pieces from 1" PVC pipe:
Two 3 1/4" lengths of 1" PVC pipe
Two 4" lengths of 1" PVC pipe
One 7" length of 1" PVC pipe.
Purchase four elbow connectors for 1" PVC pipe (~30cents each)
Connect it all together as shown in the picture for a simple filament spool holder for your Printrbot Simple

Filament Spool Holder for Printrbot Simple