I'm wondering if anyone has done a tutorial or can direct me to a site that will provide a guide to replacing the mirrors on a galvanometer shaft. A few issues come to mind. What are the best ways to remove a mirror and then prepare the shaft. What are the best adhesives and if any surface prep needs to be done to the glass or the steel shaft. How do you assure a balanced glue-up and how tolerant is this regarding the balance (this is the issue that has always deterred me).