This is a pocket case for the pocket-sized Langenscheidt Lilliput Dictionary, vintage mini dictionaries published by Barnes and Noble. The yellow preview models are from a prototype, the outside walls where the curve are are thicker than the real model, which you will see when you load the stl in to your slicer.

Creality

Ender 3 Pro

Yes

No

.2 or .4

Doesn't matter

Printing standing up with 5mm rafts will ensure no warping and it makes it so it wont matter if your bed is.

I took a measurement of the dictionary, created a 'hole' block in tinkercad, then created another block and stretched it around the hole block after changing the steps from 2mm to .25mm. Then I rounded the corners on the stretched block. I then merged these shapes. I selected the inside of the box that I'd created as the work plane. Then I added the cylinder 'hole,' tilted it to it's side, and put in my radius to get the right height so I didn't cut any of the top and bottom walls. I then positioned the cylinder 'hole' in place and merged those two shapes, completing my model.