So we get a call from an Italian University, they have been trying to manufacture thin metal components with a fine etched aperture, within a tolerance of 20um. Various attempts made but without success.
Following a number of conversations we managed to agree their needs and start chemically etching to their requirements. This happened a few weeks ago and was required for a trial so we had 48 hours to etch and ship. As this is something we do regularly the timescale was not an issue, however I have just received a call from the professor and tests have been successful – one very happy customer.