Prusa i3 Adjustable Z Axis Brackets

To help square my Z axis to the X axis I designed these brackets. They are attached to the existing Z axis upper bracket locations in the acrylic frame using M3 screws, allow a few mm of movement, and lock well into place.

I printed them upside down using Slic3r with "pillar" support which cracked out of the rail slot easily and cleanly. In ABS the friction between the components seems quite good.