Hictop Prusa I3 Print Table Leveling Calibration Tool

This is a print table leveling/calibration system I have developed for setting up my printer. The Z-axis is blocked in place with the green height setting pieces. These are made to raise the print nozzle high enough that it clears the print table surface so the extruder assembly can be moved to the center of its travel to get it out of the way.
I printed both of the green blocks at the same time ensure equal height. The pointer and attachment bracket are set up for 3mm diameter machine screws.