Customized version of http://www.thingiverse.com/thing:40703

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=40703

Using the following options:

pattern_overlap = 0
build_plate_selector = 0
pattern_radius = 8
pattern_thickness = 3
case_thickness = 1.8
pattern_rotation = 90
pattern_shape = 4
iphone_version = 2