Easy-print Ultimaker Axis Alignment Tool
Description
This tool clips onto the axes to aid in aligning them.
Instructions
Just print 2 in PLA or ABS with 0.1mm layer height and clip them onto each end of the axis you are trying to align. Be sure to loosen pulleys before aligning, and tighten them when axes are aligned. Prints in about 20 mins.
License
Easy-print Ultimaker Axis Alignment Tool by jolyboy is licensed under the Attribution - Share Alike - Creative Commons license.

Joly, what's the distance between rods on the ultimaker, and do you have an openscad file for this?
Thanks for this, it's a really great jig idea.
From memory its 40mm. Sorry, but I dont use openscad. I can upload a dxf if you want :)