Watchmaker's Bezel Lifter

I needed a bezel lifter for the revision of my Kemmner Mechanik Turtle watch. Since the [commercially available](https://www.selva.de/de/alle-kategorien/uhrmacherwerkzeug-werkstattbedarf/bergeon-werkzeug/03-werkzeug-band-gehaeuseboden-glas-zifferblatt-zeiger/luenettenabheber-o-42-mm-bergeon-234667) are simply too expensive for me, I make myself a homage to corresponding models on my lathe. As a preliminary step, I have designed the part as a 3D print to see if everything fits as I need it. Of course, the model must also work, but I can not say anything about the durability in a professional environment.
The tool is designed so that also inserts in other diameters can be made, I have added inserts for 44mm, 42mm and 40mm bezels.
Application: The two half-shells are connected with M4x30mm cylinder head screws, and the appropriate inserts are placed in the groove inside. The whole thing is then slipped over the bezel of the watch, so that the angled edge of the insert lies in the gap be