@whitequark @amenonsen Annoyingly, the microscpoe I used to use for probing chips was not stereoscopic, and the probes would be destroyed by lowering them too far by more than a few microns. I used to focus on the probe tip, then repeatedly {move the microscope focus down closer to the chip, move the probe down into focus}, so I could stop when the chip was in focus and would not overshoot with the probe.