I recommend printing this with 50% infill to make the bottom heavier and with support angles set to 65 degrees. I designed a little lip into one of the corners to make prying it off the print bed easier.
Thank you to justsomeguy01 for designing the insert and submitting pictures :)
Enjoy!
cat_bookmark_holder.stl | 183.2KB | |
Cat_Pencil_Holder_Insert.STL | 3.4KB |