Peter, I hear you. I had a customer pull the thread ring clean out of the cap of a Pristina pen - fortunately David Lim idiot-proofs his pens as the thread ring is just a tight push-fit into the cap.
These clips are very fragile, there's no getting away from it. I do two things for customers: First, I tell them to treat the pen as a precious family heirloom (just because something is fragile doesn't mean it isn't valuable), and second, I tell them that the clip does NOT carry a guarantee. If they break it, they pay me to fix it. You'd think that would put people off, but I sell more of these type of pens than any other. A psychologist could make something of that ...
