Simple page-a-day calendar stand

This is a relative simple, unobtrusive, stand for a ‘page-a-day calendar’ (or ‘scheurkalender’ in Dutch). Should be easy to print, and pins have a push fit. Designed to accommodate a common size of 18x13cm. Holes are spaced 79mm apart. (One would think 8cm would make more sense, but that didn't seem to be the case for the calendar I got here). I recommend printing a small section of the ‘top’ of the model first (by using a negative part in Bambu Studio), so you check if the holes line up properly. You might want to tweak the print quality settings. I tried to reduce the filament needed, but the back side isn't as flat as one might want. The used marble filament hides these imperfections very well, and where I'll placing the calendar nobody will ever notice, so this worked for me. If the back will be on display I recommend increasing the infill percentage and resetting the top layer options to default.