Klarheit Case

This is a case for the German "Klarheit" calendar: https://www.halloklarheit.de/

It is build to protect the calendar in everyday's use (e.g. when stuffed into a backpack). It also supports a pen attached to the calendar. The wall thickness is constructed at 2 mm, this usually gives a solid result if the printer settings are set to a good wall number.

The case comes in two parts which must be assembled with glue. The fit is tight but should work out with a normal printer's precision. Tested with two calendars and both fit with their pens. If someone tends to put a lot of stuff in the calendar, I suggest scaling the Z component by a couple percent to allow for thicker calendars. The grip mainly comes from the ridges on the inside which grip the calendar from the side so it doesn't fall out.

The notch on the topside allows to pull the calender out of the case and is positioned to it reveals the "Klarheit" imprint on the cover.