I am looking for a practical solution: Given two, three (or more) holes on a small plate, in order to repeat the drilling on another one, I would like: 1) Measure the diameter of each one. 2) Measure the distance between each pair of holes. 3) What if the holes are not drilled on a flat plate? Just for you to have an idea, imagine I want to mount a stepper on a frame and that the mounting holes of the stepper are NOT symetrical to each other. My need is by NO means limited to the stepper case, so please consider a generic situation where two, three or more holes drilled in a plate and that the plate is NOT available as a "template". I have no access to any equipment. Could you also add some idea of how much precision I could obtain with whatever method is suggested? Gracias for any help on this.