Calliper brackets for high precision printer calibration

I designed a set of 3 brackets that can solidly attach my calliper to the frame of my Mendel Prism 1.5. The advantage of that is reliability and repeatability of the measurements. It all worked so well that I would need to hunt down a more precise calliper to be able to calibrate further. YES I am saying that I have reached the limits of my calliper which is 0.01 mm. I did about 3 runs of calibration on each axis to get there. Kudos to Josef Prusa for his awesome reprap calculator. At some point