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_shape = 12
build_plate_selector = 0
pattern_rotation = 30
pattern_overlap = 30
pattern_radius = 17
pattern_thickness = 4
iphone_version = 1
case_thickness = 2.4