I encountered someone that claimed to have access to some sort of Micro 3D Printer that could print accurately down to some specified um, which I don't recall. Are any of the Vorons or any other opensource/diy 3D Printers focused on printing small parts accurately? None of them that I've looked at made any such claims and they all seem to use the same basic components. At the time I did a quick search for micro 3D Printers, or whatever term it was that he used, and found some that were priced near or over $100,000. Could they be FDM Printers, or would they have to be powder based to get high accuracy, small parts?