The changes from adafruit's iPhone 13 Pro + Mini Flexible case are pretty minimal: I added some vertical members on either side of the charging port to help bridging, but in the end I printed with tree supports. The PrusaSlicer .3mf file has the tree supports turned on.

I used glue stick as a release agent. I turned off the optical filament-out sensor on my printer since it gets confused by clear filament. I dried the filament overnight in a dehydrator and printed direct from the dehydrator.

Prusa

i3 MK3

No

No

0.3mm. Standard 0.4mm nozzle

15%

The print was easy to clean up: I could just tear off the supports with my fingers. There was some stringing in the hex pattern of the base, but a few puffs of hot air from a heat gun took care of that.