This model is pretty big. The french cleat part is a separate body that needs to be screwed into the main body, so it's at least two parts. But since those parts are very long, I included both versions, one being a single body, and one already pre-cut in parts that fits a 25cm x 21cm printing bed. You'll also need M4 inserts and counter-sunk 20mm long M4 screws.
The author marked this model as their own original creation.