Many (most?) horologists also repair BAROMETERS but as there is no obvious place to raise a question about barometers on this forum, I'll start here and if a Moderator wants to move it somewhere more appropriate, that would be great. My question is about setting up ANEROID barometers, and I don't just mean the calibration screw in the back. The power of the leaf spring can be adjusted by raising or lowering the two screws in the cast frame that the spring is attached to. If the screws are too far in, the spring is too strong for air pressure to compress the sealed capsule; too far out and the spring is too weak. So, short of trial and error (which could take months where air pressure does not change much), how should I set it up in the way that the factory might have done in the final stage of assembly? Does anyone know of a website or YouTube url that might help?