If anybody doing repairing and calibration works of survey instruemnts - Auto levels, total stations, theodolites etc. then i can provide them all makes repair and service manuals.Can develop a good repairing workshop by the help of this manuals. If anybody require survey instruments repair manuals please contact me on my email - firstname.lastname@example.org. I also have Carl Zeiss make Optical Theodolite Model THEO 010B - 1 sec. accuracy and WILD ZL Plummet for upward plumbing. If anybody require please contact me directly on my above email.