This is a rugged case for Iphone 13 Pro max that I designed. Prints easily, requires minimum hardware. Looks stylish.

PRINT\ASSEMBLY INSTRUCTIONS 

You'll need: 
Some filament 
Eight 6x3 or 6x2 round magnets

Print the front and back halves of the case on the sides facing away from the phone. Pause the print before the final layer (or layers if printing in less then 0,2 layer height) and place the magnets in their holes. Pay attention to the orientation of the magnets, they should be flipped between two halves of the case. Print camera bumb on the flat side facing away from the phone (no supports required). Print lock button and 2 volume buttons in the standard orientation. Print the volume switch on it's side. 

Place the camera bump piece in it's hole on the back half of the case. Place volume switch in the case. Switch the volume to silent on your phone and then place the phone in the back half of the case so the cameras would fit in their place and lock switch piece would align with the switch on the phone. Place the buttons in their places and then snap the front part of the case on top of the phone. You good to go!