Since this forum is shop made tools, here's a video of my best friend's Son, using a tool he designed for this one job. It's inserting a VERY fragile filter in a VERY sensitive detector. I got to play with an early prototype in his office in the Science Lab at Goddard. This is a Japanese detector. He not only spent the time designing, and working the bugs out of the inserter, but had to fly to Japan for this few minutes work.
I don't know if you have to have a subscription to dropbox or not:
https://www.dropbox.com/sh/0ywo0we8s...l-P1030913.MP4