There is an old thread here that shows a YouTube vid of how to remove the EtaChron stud from the stud support, which I think is a bad idea, as there is too much downwards pressure on the stud support when using tweezers. It can be done that way, but isn't ideal, especially when working on a clone movement where the stud support isn't as strong as an ETA movement. I put a lesson together for my class at https://efhc.org.uk/wordpress/index.php/centre-facilities/ to show how to do it without r