This is an old designed I made for an Ipad 2 with a Halo forerunner structure theme.
You need to print the back or back split depending on the size of your printer.
Print Settings
Printer Brand:
Ultimaker
Printer:
Ultimaker 2
Rafts:
Doesn’t Matter
Supports:
Yes
Resolution:
.15
Infill:
10 to 5
Credits:
Skaterlion