I've been experimenting with the use of techical pens in miniature painting, and ended up aquiring some old Pelikan Graphos technical pens in the process. Getting them disassembled for cleaning was a real pain, and I couldn't find any help online, so I though I'd share the details along with some photos: https://soulsamurai.blogspot.com/p/pelikan-technos-disassemblyassembly.html.