Flexible iPhone13Pro case

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.